Someone please help me with these Natural Logarithms questions!!!!!

I give lots of points who ever answers with an explanation of why that is the answer

Someone Please Help Me With These Natural Logarithms Questions!!!!!I Give Lots Of Points Who Ever Answers

Answers

Answer 1

The solution to the equations using natural logarithm as shown below.

How to use natural logarithm to solve equations?

To solve an equation of this nature, you need to know that the reverse of natural logarithm (ln) is exponential (e). Let apply this idea.

PART 1

Using natural logarithm to solve equations:

2eˣ = 4

eˣ = 4/2

eˣ = 2   (take "ln" of both sides to get rid of "e")

x = ln 2

x = 0.693

eˣ = 72

x = ln 72

x = 4.277

e⁴ˣ = 25

4x = ln 25

x = (ln 25)/4

x = 0.805

e³ˣ = 124

3x = ln 124

x = (ln 124)/3

x = 1.607

PART 2

ln(x -3) = 2    (take "e" of both sides to get rid of "ln")

x - 3 = e²

x = e² + 3

x = 7.389 + 3

x = 10.389

ln 2t = 4

2t = e⁴

t = e⁴/2

t = 27.299

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Related Questions

Find three consecutive integers such that 4 times the first added to the third is 92
Solve quickly Thanks

Answers

The three consecutive integers are 18, 19, and 20.

What is consecutive integers?

Consecutive integers are integers that follow each other in order, without any gaps, and differ by 1. For example, 3, 4, and 5 are consecutive integers because they follow each other in order and differ by 1.

According to question:

Let's assume that the three consecutive integers are x, x+1, and x+2. Then, according to the problem statement:

4x + (x+2) = 92

Simplifying this equation, we get:

5x + 2 = 92

Subtracting 2 from both sides, we get:

5x = 90

Dividing both sides by 5, we get:

x = 18

Therefore, the three consecutive integers are 18, 19, and 20. We can check that these integers indeed satisfy the condition given in the problem:

4 times the first integer is 4*18 = 72, and when we add the third integer 20 to it, we get 72 + 20 = 92, as required.

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Two cars leave the same parking lot, one heading north and the other east. After several minutes, the eastbound car traveled 5 kilometers. If the two cars are now a straight-line distance of 13 kilometers apart, how far has the northbound car traveled?

Answers

Based on the information given, we can use the Pythagorean theorem to determine the distance traveled by the northbound car.

Let's denote the distance traveled by the northbound car as 'x' kilometers.

According to the Pythagorean theorem, in a right triangle, the square of the hypotenuse (the straight-line distance between the two cars) is equal to the sum of the squares of the other two sides (the distances traveled by each car).

In this case, the northbound car's distance is 'x' kilometers and the eastbound car's distance is 5 kilometers.

So we have the equation:

x^2 + 5^2 = 13^2

Simplifying, we get:

x^2 + 25 = 169

Subtracting 25 from both sides, we get:

x^2 = 144

Taking the square root of both sides, we get:

x = 12

So the northbound car has traveled 12 kilometers.

Answer: 12 km

Step-by-step explanation:

As seen in the figure the distance that the northbound car traveled equals to the distance from point N to the parking lot.

pythagorean: [tex]\sqrt{13^{2}-5^{2} }=12km[/tex]

Help me this is a Screensho
t

Answers

Answer:

21.8 - 0.1 = 21.7

21.7 is 0.1 less than 21.8

Answer:

The answer is 21.7

Step explanation

21.8 - 0.1 = 21.7

I hope it helped you.

Please Mark me brainliest

5. Apply Math Models A science teacher uses a fair spinner
simulate choosing 1 of 5 different field trips for her classes.
spinner has 5 equal sections, each representing a different
trip. The teacher spins the spinner 50 times and records the
results in the table below.

Answers

Experimental and theoretical probabilities do not match; Field Trip B is the most popular with 32% relative frequency.

What is frequency?

Frequency refers to the number of times an event or observation occurs within a given period, sample size, or population. In the context of data analysis, frequency is often used to describe how often a particular value or category appears in a dataset or sample. It can be expressed as an absolute frequency (the actual number of times an event occurred) or a relative frequency (the proportion or percentage of times an event occurred compared to the total number of observations).

The experimental probability of selecting each field trip can be calculated by dividing the number of times each trip was selected by the total number of spins. For example, the experimental probability of selecting Field Trip A is 8/50 = 0.16 or 16%, the experimental probability of selecting Field Trip B is 16/50 = 0.32 or 32%, and so on.

The theoretical probability of selecting each field trip is 1/5 or 0.2 or 20%. This is because the spinner has 5 equal sections, and each section represents a different trip.

The experimental and theoretical probabilities do not match exactly. For example, the experimental  of selecting Field Trip B is 0.32 or 32%, while the theoretical probability is only 0.2 or 20%. This could be due to chance or random variation, as the teacher only spun the spinner 50 times. With a larger sample size, the experimental and theoretical probabilities should converge closer to each other.

The relative frequency of selecting each field trip can be calculated by dividing the number of times each trip was selected by the total number of spins, and then multiplying by 100 to express it as a percentage. For example, the relative frequency of selecting Field Trip A is (8/50) x 100 = 16%, the relative frequency of selecting Field Trip B is (16/50) x 100 = 32%, and so on.

Based on the data, Field Trip B appears to be the most popular, as it was selected the most number of times (16 times out of 50 spins).

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Commplete Question:

A science teacher uses a fair spinner to simulate choosing one of five different field trips for her classes. The spinner has 5 equal sections, each representing a different trip. The teacher spins the spinner 50 times and records the results in the table below:

Field Trip Number of times selected

A                8

B                16

C               9

D                12

E                5

Apply math models to analyze the data and answer the following questions:

What is the experimental probability of selecting each field trip?

What is the theoretical probability of selecting each field trip?

Do the experimental and theoretical probabilities match? If not, what could be the reason for the difference?

What is the relative frequency of selecting each field trip?

Based on the data, which field trip appears to be the most popular?

Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find P32, the 82-percentile (using GeoGebra). This is the temperature reading separating the bottom 82% from the top 18%. Round your answer to the nearest 1000th if necessary.

Answers

Answer: To find the temperature reading separating the bottom 82% from the top 18%, we need to find the z-score that corresponds to the 82nd percentile, and then use it to find the temperature value. We can use GeoGebra to find the z-score and the corresponding temperature value as follows:

Click on the "Functions" icon and select "InvNorm" function.

Enter the percentile value, which is 0.82 for the 82nd percentile.

Enter the mean and standard deviation values, which are 0 and 1 for this problem.

Click on the "Evaluate" button to find the z-score.

The resulting z-score is 0.934, rounded to 3 decimal places.

This means that the temperature reading separating the bottom 82% from the top 18% is 0 + (0.934)(1.00) = 0.934°C above freezing.

Rounded to the nearest 1000th, this value is 0.934°C.

Therefore, P32, the temperature reading separating the bottom 82% from the top 18%, is approximately 0.934°C.

Step-by-step explanation:

41 Points!! Multiple choice algebra question. Use the value of the discriminant to determine the number and type of roots for the equation x^2-3x+7=0. Photo attached. Thank you!

Answers

Since the discriminant is negative, the equation has two complex conjugate roots is -19.

How to find complex conjugate roots?

To find complex conjugate roots of a polynomial, you can follow these steps:

Identify the complex roots of the polynomial: Use the quadratic formula or any other method to find the roots of the polynomial. If the roots are complex, they will be of the form a + bi, where a and b are real numbers and i is the imaginary unit.

Check for conjugate pairs: If a complex root is of the form a + bi, then its complex conjugate will be a - bi. Check if the polynomial has any other root of the form a - bi. If so, then the two roots are complex conjugates.

For example, suppose you have a polynomial with the equation:

[tex]x^3 - 4x^2 + 7x - 10 = 0[/tex]

Using a calculator or other methods, you can find that one of the roots of this polynomial is approximately 1.72 + 0.98i. To check if this is part of a complex conjugate pair, you can check if the polynomial has another root of the form a - bi.

One way to do this is to use polynomial long division to divide the original polynomial by the quadratic factor (x - (1.72 + 0.98i)) (x - (1.72 - 0.98i)).

To determine the number and type of roots of the equation x^2 - 3x + 7 = 0, we need to use the discriminant, which is given by the formula b^2 - 4ac.

In this case, a = 1, b = -3, and c = 7. Substituting these values into the formula, we get:

[tex]b^2 - 4ac = (-3)^2 - 4(1)(7) = 9 - 28 = -19[/tex]

Since the discriminant is negative, the equation has two complex conjugate roots.

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1,5/2,25/4 6th term.

Answers

Answer:

3125

32

Step-by-step explanation:

[tex]formula = a {r}^{n - 1?} [/tex]

r=5

2

a=1

n=6

1×5 (6-1)

2

5 (5)

2

=3125

32

Find the surface Area

Math step by step Answer

Answers

(a) The total surface area of the triangular prism is 560 in².

(b) The surface area of the cuboid is 944 ft².

(c) The surface area of the cylinder is  678.58 in².

What is the surface area of the cuboid, cylinder and prism?

Cuboid;

The surface area of the cuboid is calculated as;

S.A = 2(12 x 16  +  12 x 10  + 16 x 10)

S.A = 944 ft²

Cylinder:

The surface area of the cylinder is calculated as follows;

S.A = 2π x 6 (6 + 12)

S.A = 678.58 in²

The surface area of a triangular prism can be calculated by summing the areas of its individual faces.

A triangular prism has three rectangular faces and two triangular faces.

The formula for the surface area of a triangular prism is:

Surface Area = Area of triangular faces + Area of rectangular faces

To calculate the area of a triangular face, we can use the formula for the area of a triangle:

Area of a triangle = (base × height) / 2

Given that S₁ = 8 in, S₂ = 12 in, S₃ = 8 in, and the length between the two triangular faces is 18 in, we can proceed with the calculations.

The area of the triangular face with dimensions S₁ = 8 in and S₂ = 12 in is:

Area of triangular face 1 = (8 in × 12 in) / 2 = 48 in²

The area of the triangular face with dimensions S₂ = 12 in and S₃ = 8 in is:

Area of triangular face 2 = (12 in × 8 in) / 2 = 48 in²

The area of the triangular face with dimensions S₃ = 8 in and S₁ = 8 in is:

Area of triangular face 3 = (8 in × 8 in) / 2 = 32 in²

Now, let's calculate the area of the rectangular faces.

Area of rectangular face 1 = 18 in × 12 in = 216 in²

Area of rectangular face 2 = 18 in × 12 in = 216 in²

Finally, we can sum up all the areas to get the total surface area of the triangular prism:

Surface Area = Area of triangular faces + Area of rectangular faces

Surface Area = 48 in² + 48 in² + 32 in² + 216 in² + 216 in² = 560 in²

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A particular sound wave can be graphed using the function y= -1sin 5x. Find the period of the function

Answers

Answer:

The period of a sine function of the form y = a sin bx is given by:

period = (2π) / |b|

In this case, the function is y = -1 sin 5x, which can be rewritten as y = -sin(5x). So, we can see that b = 5.

Substituting b = 5 into the formula, we get:

period = (2π) / |5|

period = π / 5

Therefore, the period of the function is π/5.

In a certain trail mix, 65% of the total weight is made up of nuts. Of that 65%, 3/5 of the nuts are cashews. If the total weight of the trail mix is 200 grams, how many grams are cashews?​

Answers

There are 78 grams of cashews in the trail mix.

What is weight?

Weight is the measure of the gravitational force exerted on an object due to its mass. It is commonly measured in units of mass, such as kilograms or pounds. Weight can vary depending on the gravitational pull of the planet or other celestial body on which the object is located. For example, an object that weighs 100 kilograms on Earth would weigh less on the Moon due to the Moon's lower gravitational force. It is important to distinguish between weight and mass, as they are not the same thing. Mass is a measure of the amount of matter in an object, whereas weight is a measure of the force exerted on an object by gravity.

If 65% of the total weight is made up of nuts, then the weight of nuts in the trail mix is 0.65 × 200g = 130g

Out of the 130g of nuts, 3/5 are cashews. So the weight of cashews in the trail mix is (3/5) × 130g = 78g

Therefore, there are 78 grams of cashews in the trail mix.

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Please help me. Giving brainliest to whoever gets it right!!

Answers

The equation of the line is: y = 0.5x + 4 and the inequality is H > 74.25

The equation of the graph

To find the equation of a line that passes through two points, we need to use the slope-intercept form of a linear equation:

y = mx + b

The slope is calculated as

m = (y2 - y1) / (x2 - x1)

m = (11 - 4) / (14 - 0)

m = 7/14

m = 1/2

m = 0.5

Next, we have

y = mx + b

4 = 0.5(0) + b

b = 4

So the equation of the line is: y = 0.5x + 4

Jacy's music download

Part A: The equation that could be used to find the value of s is:

12s + 5.04 = 15.48

To find the value of s, we need to isolate the variable on one side of the equation.

We can do this by subtracting 5.04 from both sides and then dividing both sides by 12:

12s + 5.04 - 5.04 = 15.48 - 5.04

12s = 10.44

s = 10.44/12

s = 0.87

Therefore, Jacy paid $0.87 to download each song.

Tara's inequality

To represent the number of hours, h, that Tara plans to work this month as an inequality, we can use the fact that she plans to work more hours than last month.

Let H be the total number of hours that Tara works this month.

Then we can write:

H > 16.5 + 19 + 23 + 15.75

Simplifying the right-hand side, we get:

H > 74.25

Therefore, the inequality that represents the number of hours, h, Tara plans to work this month is: H > 74.25

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A certain disease has an incidence rate of 0.8%. If the false negative rate is 4% and the false positive rate is 2%, compute the probability that a person who tests positive actually has the disease.

Answers

The probability that a person who tests positive actually has the disease is ≈0.0158.

what is probability?

        Probability is a way to gauge how likely something is to happen. Many things are difficult to forecast with absolute confidence. Using it, we can only make predictions about the likelihood of an event happening, or how likely it is. Probability can range from 0 to 1, with 0 denoting an impossibility and 1 denoting a certainty. 1 is the probability of every event in a sample space.

    For instance, when we flip a coin, there are just two possible results: Head OR Tail. (H, T). However, if two coins are tossed, there are four possible results: (H, H), (H, T), (T, H), and (T, T).

we solve the given question using BAYE's theorem:

Bayes' Theorem states that the conditional probability of an event, based on the occurrence of another event, is equal to the likelihood of the second event given the first event multiplied by the probability of the first event.

P(disease/positive)= [tex]\frac{P(disease)P(positive/disease)}{P(disease)P(positive/disease)+P(no disease)P(positive/disease)}[/tex]

P(disease/positive)= [tex]\frac{(0.008)(0.04)}{(0.008)(0.04)+(0.992)(0.02)}[/tex]  ≈ 0.0158

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A walk alongside a railway track is represented on a map by an 86 mm straight line.

The walk is 17.2 km.

What is the scale of the map?

Answers

First we turn the 17.2 km into mm. To do that we turn it into 17,200 m then into 1,720,000 cm then into 17,200,000 mm. Then we just divide 17.2 million by 86 so 17,200,000÷86=200,000. so we know that the scale of the map is 1:200,000. Also pls mark as brainliest answer thx.

Help fast please, it should be asap please

Answers

The function has a vertical asymptote at x = 1, x-intercepts are x = 1 and x = 5, hole at x = 5 and horizontal asymptote is y = 0.

Define rational function

A rational function is a function that can be expressed as the ratio of two polynomial functions. In other words, it is a function of the form f(x) = p(x)/q(x), where p(x) and q(x) are polynomial functions and q(x) is not equal to zero for any value of x.

To plot the rational function f(x) = (x² - 6x + 5)/(-x + 1)

Vertical asymptote: The denominator of the function (-x + 1) is equal to zero when x = 1.

Therefore, there is a vertical asymptote at x = 1.

x-intercept: To find the x-intercept, we set the numerator equal to zero and solve for x:

x² - 6x + 5 = 0

This quadratic equation can be factored as:

(x - 5)(x - 1) = 0

Therefore, the x-intercepts are x = 1 and x = 5.

y-intercept: To find the y-intercept, we set x equal to zero:

f(0) = (0² - 6(0) + 5)/(-0 + 1) = 5

Therefore, the y-intercept is (0, 5).

Hole: The function has a hole at x = 5 because both the numerator and the denominator become zero at x = 5.

Horizontal asymptote: To find the horizontal asymptote, we need to compare the degrees of the numerator and the denominator. The degree of the numerator is 2 and the degree of the denominator is 1, so the horizontal asymptote is y = 0.

Now, we can plot the function by choosing some values of x and calculating the corresponding values of y:

x y = f(x)

-1 4

0 5

0.5 3.25

1 undefined

2 -1

Image is attached below.

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A triangle is shown with its exterior angles. The interior angles of the triangle are angles 2, 3, 5. The exterior angle at angle 2 is angle 1. The exterior angle at angle 3 is angle 4. The exterior angle at angle 5 is angle 6. Which statements are always true regarding the diagram? Select three options. m∠5 + m∠3 = m∠4 m∠3 + m∠4 + m∠5 = 180° m∠5 + m∠6 =180° m∠2 + m∠3 = m∠6 m∠2 + m∠3 + m∠5 = 180°

Answers

The statements that are always true regarding the given diagram of the triangle are m∠2 + m∠3 = m∠6, m∠3 + m∠4 + m∠5 = 180°, m∠5 + m∠6 = 180°. Therefore, options (4) and (5) are not always true.

What is an exterior angle?

An exterior angle of a polygon is an angle that forms a linear pair with an interior angle of the polygon. In other words, it is an angle formed by extending one of the sides of the polygon. For any given vertex of the polygon, the exterior angle is the angle between a line containing the side of the polygon next to the vertex and a line that is an extension of the adjacent side. The measure of an exterior angle is equal to the sum of the measures of its corresponding remote interior angles (interior angles that are not adjacent to the exterior angle). The sum of the exterior angles of any polygon, including a triangle, is always equal to 360 degrees. Exterior angles are used in a variety of geometric proofs and constructions.

We know that the sum of all the interior angles of any triangle is 180 degrees. Therefore, we can use this fact to determine which statements are always true regarding the given diagram.

Now, we can use the following relationships between the interior and exterior angles of a triangle:

Exterior angle = Sum of interior angles adjacent to it

Interior angle = 180  - Exterior angle

Using these relationships, we can determine which statements are always true:

m∠5 + m∠3 = m∠4: This is true because the exterior angle at angle 3 is equal to the sum of angles 3 and 4, and the exterior angle at angle 5 is equal to the sum of angles 5 and 6. Therefore, m∠5 + m∠3 + m∠6 = m∠4 + m∠3, which simplifies to m∠5 + m∠3 = m∠4.

Given m∠3 + m∠4 + m∠5 = 180°: This is true because the sum of all the interior angles of a triangle is 180 degrees.

m∠5 + m∠6 = 180°: This is not always true because sum of all the angles should be 180. It is true in this specific case because angle 1 is a straight angle, which means that m∠5 + m∠6 = 180°. However, in general, this statement is not always true.

m∠2 + m∠3 = m∠6: This is true because the exterior angle at angle 2 is equal to the sum of angles 2 and 6. Therefore, m∠2 + m∠3 = m∠6.

Given m∠2 + m∠3 + m∠5 = 180°: This is may not always true. It is true in this specific case because angle 1 is a straight angle, which means that m∠2 + m∠3 + m∠5 = 180°. However, in general, this statement is not always true.

Therefore, the three statements that are always true from the diagram are:

m∠5 + m∠3 = m∠4

m∠3 + m∠4 + m∠5 = 180°

m∠2 + m∠3 = m∠6

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A survey stopped men and women at random to ask them where they purchased groceries, at a local grocery store or online.

What percent of the people surveyed shop at a local grocery store? Round your answer to the nearest whole number percent.

Answers

63% of people Surveyed shop at a local grocery store.

What is percentage ?

A number can be expressed as a fraction of 100 using a percentage. The word "%" stands for percentage.

For instance, 50% represents 50 out of 100, or 0.5 in decimal form. Frequently, proportions, rates, and changes in quantity are represented as percentages.

In many aspects of daily life, including the calculation of sales tax, loan interest rates, and price discounts, percentages are frequently utilised. They are also employed in many academic disciplines, including math, physics, economics, and statistics.

What are proportions ?

The equality of two ratios is referred to as a percentage in mathematics. A ratio is a comparison of two amounts or values;

it is frequently stated as a fraction.

For instance, "3/5" can be used to represent the proportion of boys to girls in a classroom.

An assertion of equality between two ratios is a proportion.

For instance, the ratio of males to girls is the same as the ratio of boys to all pupils,

hence the sentence "3/5 = 6/10" is a proportion.

Analysis: -

people surveyed at store = 45

total no. of people = 72

the

Percent of peopla = 45/72  x100

= 0.625 × 100

= 62.5 %

= 63 %

63% of people Surveyed shop at a local grocery store.

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find the value of x

Answers

Therefore, the height of the right triangle is 9.6 units.

What is triangle?

A triangle is a geometric figure that consists of three line segments that intersect at three endpoints, called vertices. The line segments are called sides, and the vertices where they intersect are called angles. A triangle can be classified based on the length of its sides and the measure of its angles. Triangles are fundamental to many areas of mathematics and physics, and they have a wide range of applications in real-life situations, such as in architecture, engineering, and surveying.

Here,

To find the height of a right triangle, we can use the formula:

h = (a * b) / c

where "a" and "b" are the lengths of the legs of the right triangle, and "c" is the length of the hypotenuse.

In this case, we have a right triangle with legs of lengths 12 units and 16 units, and a hypotenuse of length 20 units. Therefore, we can substitute these values into the formula and solve for the height:

h = (12 * 16) / 20

h = 192 / 20

h = 9.6

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Solve: 24b=6
A b=1/6
B b=1/2
C b=1/3
D b=1/4​

Answers

Answer:

D. b=1/4

Step-by-step explanation:

Find the area of the shaded region. The graph depicts the standard normal distribution of bone density scores with mean 0 and standard deviation 1.

Answers

Answer: 0.6954

Step-by-step explanation:

To find the area between two z scores, in this case P(-0.82<z<1.29), we can either use a z score calculator or a standard normal distribution table, which I will use for this.  

The probability of P(-0.82<z<1.29) = P(z<1.29)-(z<-0.82).

To find P(z<2.01), we use a positive z score standard normal distribution table and find that P(z<1.29)=0.9015

Using a negative z score standard normal distribution table, we can find that (z<-0.82)=0.2061.

So,  P(-0.82<z<1.29) = P(z<1.29)-(z<-0.82)=0.6954.

Que alguien me resuelva este ejercicio

Answers

Tan (210°-150°)

Tan= (60°)

Exact value of Tan(60°) = √3

In Math town,60% of the population are males and 30% of them have brown eyes. Of the total math town population 28 % have brown eyes. What percentage of the females in math town have brown eyes?
A) 20%
B) 24%
C) 25%
D) 28%

Answers

Therefore , the solution of the given problem of percentage comes out to be D) 28% is the right response.

What is percentage?

The shorthand "a%" is used in statistics to represent a number or metric that may be expressed as a percentage of 100. Additionally strange spelling include "pct," "pct," as "pc." The approach that is most frequently employed for this is the percentage symbol ("%"). Any hints or set proportions of any part for the total are also unknown. Since numbers commonly add up to 100, they are effectively integers.

Here,

According to the facts provided, 30% of the male population and 60% of the people in Math Town are male.

This suggests that between 30% and 60% of people have brown eyes.

Let's figure out what proportion of the entire population is equal to 30% of 60%:

=> 30% of 60% = (30/100) * (60/100)

=>  0.3 * 0.6

=>  0.18 or 18%

Therefore, brown eyes are present in Math Town's overall population of 18%.

Since the only other gender listed is females and we are aware that 18% of the population as a whole has brown eyes, we can infer that 18% of women also have brown eyes.

Therefore, D) 28% is the right response.

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12x + 2y, when x = 7 and y = 8 help me please

Answers

Answer:

100

Step-by-step explanation:

12x + 2y ← substitute x = 7 and y = 8 into the expression

= 12(7) + 2(8)

= 84 + 16

= 100

1 1/4 - 1 1/5

Pls answer it today!

Answers

answer: 1/20
1 1/4=5/4 = 25/20
1 1/5=6/5 = 24/20

Answer:

fraction form: 1/20

decimal form:0.05

The area of a rectangular room is 750 square feet. The width of the room is 5 feet less than the length of the room. Which equations can be used to solve for y, the length of the room? Select three options. y(y + 5) = 750 y2 – 5y = 750 750 – y(y – 5) = 0 y(y – 5) + 750 = 0 (y + 25)(y – 30) = 0

Answers

Answer:

y² -5y = 750750 -y(y -5) = 0(y +25)(y -30) = 0

Step-by-step explanation:

You want three equations that can be used to solve for the length (y) of a room that is whose width is 5 feet less than its length and whose area is 750 square feet.

Area

The area of the room is the product of its length and width. We are given that the length is y, so the width is (y-5) and that product is ...

  A = LW

  750 = y(y -5)

This equation can be rearranged into several different forms:

  y² -5y = 750 . . . . . . . multiply it out

  750 -y(y -5) = 0 . . . . . subtract the right side expression

  (y +25)(y -30) = 0 . . . . factor it

what is the weight of a 38kg child

Answers

the weight of the child is 83.78 pounds

Express answers in terms of pi.


1. The radius of a cylinder is 10; the height is 2. Find:

a. circumference of the base

b. area of the base

c. L.A.

d. T.A,

e. V

2. Repeat Excercise 1, using a cylinder in which r = 2 and h = 10.

a. b. c. d. e.

Answers

Answer:

1 b

2.c

ythis the best choice

The circumference and the areas and the volumes are calculated below

Calculating the circumference and the areas

For a cylinder with a radius of 10 and a height of 2:

a. The circumference of the base is 2πr = 2π(10) = 20π.b. The area of the base is πr² = π(10)² = 100π.c. The lateral area is 20π(2) = 40π.d. The total surface area is the sum of the lateral area and the areas of the two bases. 2πr² + 2πrh = 2π(10)² + 2π(10)(2) = 400π + 40π = 440π.The volume of the cylinder is given by the formula V = πr²h = π(10)²(2) = 200π.

For a cylinder with a radius of 2 and a height of 10:

a. The circumference of the base is 2πr = 2π(2) = 4π.b. The area of the base is πr² = π(2)² = 4π.c. The lateral area is 4π(10) = 40π.d. The total surface area is 2πr² + 2πrh = 2π(2)² + 2π(2)(10) = 8π + 40π = 48π.e. The volume of the cylinder is given by the formula V = πr²h = π(2)²(10) = 40π.

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Part 1: Hitting a golf ball into a tower? While on the golf course last weekend Marc hit into the rough, landing the ball behind a tall tree. To get out of the scenario, his best option was to hit the ball high enough so it goes over the tree and hopefully comes down in the fairway for his next shot. So with a mighty swing, he hit the ball into the air and was surprised to see it hit near the top of a 300 foot tall tower that he had not noticed. The formula for this shot is h(x) = -16xsquared + 120x, where h is the height of the ball and x is the number of seconds the ball is in the air. 1. How could Marc mathematically try to prove that he hit the ball near the top of the tower?​

Answers

Since the maximum height h is equal to 225 ft which is close to 300 ft we can conclude that Marc hit the ball near the top of the tower.

The maximum point of the quadratic function :

The concept used in this problem is the quadratic function and finding the maximum or minimum value of a quadratic function.

The x-coordinate of the vertex, which is the highest or lowest point on the graph, can be found using the formula:

=> x = -b / 2a

Here we have

The formula for the shot is h(x) = -16xsquared + 120x,

Where h is the height of the ball and x is the number of seconds the ball is in the air.

To mathematically prove that Marc hit the ball near the top of the tower, find the maximum height reached by the ball and compare it with the height of the tower.

To find the maximum height reached by the ball, find the vertex of the parabolic function h(x).

As we know

The x-coordinate of the vertex is given by:

x = -b / (2a)

Where a and b are the coefficients a and b

In this case, a = -16 and b = 120, so we have:

x = -120 / (2(-16)) = 3.75 seconds

The maximum height reached by the ball is given by:

h(3.75) = -16(3.75)² + 120(3.75) = 225 feet

To prove that Marc hit the ball near the top of the tower, we need to compare the maximum height reached by the ball (225 feet) with the height of the tower (300 feet).

Since the ball hit near the top of the tower, we can assume that it was close to the highest point of the tower when it was hit.

Therefore,

Since the maximum height h is equal to 225 ft which is close to 300 ft we can conclude that Marc hit the ball near the top of the tower.

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* Which shape is both a rectangle and a square?

Answers

Answer:

A square is a type of rectangle, so any square can also be called a rectangle. However, not all rectangles are squares.

A rectangle is a quadrilateral with four right angles, whereas a square is a special type of rectangle with four right angles and four equal sides.

So the shape that is both a rectangle and a square is a square.

Kennedy has $0.81 worth of pennies and nickels. She has 9 more nickels than pennies. Write a system of equations that could be used to determine the number of pennies and the number of nickels that Kennedy has. Define the variables that you use to write the system

Answers

The system of equations that could be used to determine the number of pennies and the number of nickels that Kennedy has is 0.01b + 0.05d = 0.81

b = 9d

The variables used to write the system of equation is Number of pennies = b

Number of nickels = d

Write the equations that could be used to determine the number of pennies and nickels?

Let

Number of pennies = b

Number of nickels = d

0.01b + 0.05d = 0.81

b = 9d

Therefore, the variables are b for pennies and d for nickels.

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Your Equifax score is 650, Transunion at 600, and Experian at 635, what is your mean score? Round to the nearest whole point.

Answers

The mean score is 628.

What is mean?

In statistics, the mean is a measure of central tendency, which represents the average value of a data set. It is also known as the arithmetic mean and is calculated by adding up all the values in the data set and then dividing by the number of observations in the data set. The formula for calculating the mean is:

mean = (sum of all values) / (number of observations)

Now,

To find the mean score, you need to add up the three scores and then divide by 3:

(650 + 600 + 635) / 3 = 628.33

Rounding to the nearest whole point, the mean score is 628.

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