1. An account is opened with an initial deposit of $6,500
and earns 3.6% interest compounded semi-annually.
What will the account be worth in 20 years?

1) The decay constant is  0.0385

2) The amount after ten years is  27.2 mg

3) The time taken for 10 mg to remain is  36 years.

We know that;

P = Poe^-kt

Given that the half life is 18 years;

20=40e^-18k

20/40=e^-18k

0.5 =e^-18k

ln0.5 = -18k

k = -0.693/-18k

k = 0.0385

After 10 years we have;

P = 40e^-10(0.0385)

P = 27.2 mg

10 mg will remain when;

10 = 40e^-0.0385t

10/40 =e^-0.0385t

0.25 = e^-0.0385t

ln0.25 = -0.0385t

t = -1.386/-0.0385

t = 36 years

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The total number of meals received by the company this month = 40 meals

Given data ,

Let the number of meals received by the company this month be A

Now , the proportion is given as

The number of boxes of meals in the past month = 3 boxes

The number of meals in 3 boxes = 15 meals

The number of boxes in the present month = 8 boxes

So , the proportion is

15 / 3  = A / 8

Multiply by 8 on both sides , we get

A = 5 x 8

A = 40 meals

Hence , the number of meals is A = 40 meals

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The measure of the angle is A. 125^o

A measure of an angle which lies between 90^o and 180^0 is said to be obtuse. This implies that the measure of the angle is greater than a right angle but less than the sum of angles on a straight line.

In the given expression, the halfway between 120 and 130 degrees is given as;

(120 + 130)/ 2 = 125

Thus given that the angle has one ray pointing towards zero, then the other ray is pointing towards 125 degrees.

Then it can be concluded that the measure of the angle is A. 125^o.

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The distance along the trail from X to Y, to the nearest tenth of a meter, is 600 meters.

The distance between X and Y is on a straight path from X to Y or Y to X. This means that the distance between X and Y can be found by finding the distance between the contour lines.

The distance between the contour lines is:

= Elevation of Y - Elevation of X

= 1, 900 - 1, 300

= 600 meters

In conclusion, the distance along the trail between X and Y is 600 meters.

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A function which has the greater maximum value is: function f(x).

In Mathematically, the axis of symmetry of a quadratic function can be calculated by using this mathematical expression:

Axis of symmetry (vertex), Xmax = -b/2a

Where:

a and b represents the coefficients of the first and second term in the quadratic function.

For the given quadratic function f(x) = -x² - 3x + 1, we have:

Axis of symmetry, Xmax = -(-3)/2(-1)

Axis of symmetry, Xmax = 3/-2 = -1.5.

For the value of k in vertex, we have:

f(x) = -x² - 3x + 1

f(-1.5) = -(1.5)² - 3(-1.5) + 1

f(-1.5) = 3.25

For g(x), the maximum value or vertex is 2 and as such, quadratic function f(x) has the greater maximum value.

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The degree of the polynomial function f(x) = -2x + 2x3 is 3

From the question, we have the following parameters that can be used in our computation:

f(x) = -2x + 2x3

The degree of a polynomial function is the higtest power in the polynomial

In f(x) = -2x + 2x3, the highest power is 3

Hence, the degree is 3

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The area of the triangle is; 33 in².

The area of the rectangle is; 190 in².

The total area as required is; 223 in².

By observation; the triangle is such that its base is 6 in and it's height is; (20 - 9) = 11 in.

Therefore, the area of the triangle given by; (1/2)×b×h is; (1/2) × 6 × 11 = 33 in².

The area of the rectangle of length 20 in and width 9.5 in is; 20 × 9.5 = 190 in².

Ultimately, the total area of the composite shape is; 33 + 190 = 220 in².

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The x and y int for the equation are x = undefined and y-int = 1

From the question, we have the following parameters that can be used in our computation:

y = 4^x

Set the variable x to 0 to calculate the y-intercept

So, we have

y-int = 4^0

y-int = 1

Set the variable y to 0 to calculate the x-intercept

So, we have

4^x = 0

So, we have

x = ln(0)/ln(4)

Evaluate

x = undefined

Hence, the x-intercept is undefined

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Answer:

[tex]B. y=-1/4x+6.[/tex]

Step-by-step explanation:

The line perpendicular to the line y = 4x + 5 would need a slope of -1/4.

The slope of any perpendicular line multiplied by the original line must equal -1. Therefore, only answer B works.

Answer:

B

Step-by-step explanation:

The given line is a slope -intercept form

  y = mx + b     m is the slope

   for this line slope = 4

PERPENDICULAR slope is  - 1/m  = = -  1/4   <====you just have to LEARN this!

Answer B has slope = - 1/4

Answer:

The first one

Step-by-step explanation:

She cant buy anything over $15, but she can buy something thats $15 :))

Any quarter with sales level less than or equal to 7.908 million dollars would be considered a "failure" by this company.

To determine this sales level, we need to find the 20th percentile of the normal distribution with mean 9 million dollars and standard deviation 1.3 million dollars.

By using a standard normal distribution table we can find that the z-score corresponding to the 20th percentile is approximately -0.84.

The sales level that is the cutoff between quarters that are considered "failures" will be:

-0.84 = (x - 9)/1.3

- 0.84 * 1.3 = x - 9

- 1.092 = x - 9

x = 9 - 1.092

x = 7.908

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A reflection transformation on a coordinate plane changes the figure over a line called the line of reflection. This line acts as a reflect and the picture created by the change could be a reflect picture of the first figure.

b. In case a figure is reflected over the x-axis, the x-coordinates of all the focuses within the figure will stay the same, but the y-coordinates will be increased by -1. So, in the event that a point on the initial figure has arranges (x,y), its picture after reflecting over the x-axis will have arranges (x,-y).

c. In case a figure is reflected over the y-axis, the y-coordinates of all the points within the figure will remain the same, but the x-coordinates will be copy by -1. So, in case a point on the first figure has push (x,y), its image   after reflecting over the y-axis will have arranges (-x,y).

Therefore, d. To reflect a triangle over the y-axis, we need to know the  the mirror image  of each point with regard to the y-axis. One way to do usually to increase the x-coordinate of each point by -1 and also keeping the y-coordinate the same.

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See text below

2. Reflections:

Transformations Review

a. How would you describe what this transformation looks like when performed on a coordinate plane?

b. If your figure was reflected across the x-axis, how would that affect the figure's coordinates?

c. If your figure was reflected across the y-axis, how would that affect the figure's coordinates?

d. On the coordinate plane: First, plot a triangle. Then, reflect your triangle over the y-axis and draw the result:

Answer:

answers in picture

(Btw we can’t see one of the triangles so you can just assume that the last one would be 46 degrees)

Step-by-step explanation:

Hope this helps! Pls give brainliest!

A better prediction in the scatter plot when for x when y = 7 would be

A scatter plot, аlso known as a scatter diagram or scatter grаph, is a grаphical representаtion оf dаtа thаt displays thе relаtionship between twо variables.

It is used to investigate thе сorrelation or relаtionship between twо quantitativе variables, tyрically rеprеsеntеd on thе x-axis and y-aхis оf a Сartesian cооrdinate system.

In the coordinate Cartesian system shown, for y = 7 the value closest is 11.  x = 52 is far away and will correspond to higher vales of y.

The relationship is a positive association

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Check the picture below.

0,0,0,0,0,

The image of △FGH after the similarity transformation is △F"G"H", with vertices F"(-2, 2), G"(-2, 6), and H"(2, 6).

To perform the similarity transformation, we first apply the translation by subtracting 3 from the x-coordinates and subtracting 1 from the y-coordinates:

F' = (2-3, 2-1) = (-1, 1)

G' = (2-3, 4-1) = (-1, 3)

H' = (4-3, 4-1) = (1, 3)

Next, we apply the dilation with a scale factor of 2 by multiplying each coordinate by 2:

F" = 2(-1, 1) = (-2, 2)

G" = 2(-1, 3) = (-2, 6)

H" = 2(1, 3) = (2, 6)

So the image of △FGH after the similarity transformation is △F"G"H", with vertices F"(-2, 2), G"(-2, 6), and H"(2, 6).

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Answer:

x ≈ 11.3

Step-by-step explanation:

using the cosine ratio in the right triangle

cos61° = [tex]\frac{adjacent}{hypotenuse}[/tex] = [tex]\frac{DE}{DF}[/tex] = [tex]\frac{5.5}{x}[/tex] ( multiply both sides by x )

x × cos61° = 5.5 ( divide both sides by cos61° )

x = [tex]\frac{5.5}{cos61}[/tex] ≈ 11.3 ( to the nearest tenth )

Answer:

Step-by-step explanation:

27 times 3

= 81

Answer: 81

Step-by-step explanation: 27x3 ok what 3^to the 4th power so it would be 3x3x3x3

      9x9=81 is the same as saying 27x3

Answer:  D

Step-by-step explanation:

Point of tangency is where the line on the left touches the circle.  Have you ever heard the term "She's going off on a tangent"- it means they only touch the topic(tangent point and go off (tangent line) and talk way off away from where you need to be(circle)

So you can see from the graph the point of tangency (where line touches circle is (-5,0)

the equation for the line is going to be a constant.  The line only touches the x-axis never the y-axis at all points it is x=-5

so the equation of the line x= -5

The problem has no real number solutions since the discriminant is equal to -16.

Given the quadratic equation below:

-1 = 5x² -2x,

On rearranging the equation will becomes;

5x² -2x+1 = 0

The formula for calculating the discriminant is expressed as:

D = b^2 - 4ac where:

a = 5

b = -2

c = 1

Substitute to have:

D = (-2)^2 - 4(5)(1)
D = 4 - 20
D = -16

The discriminant is equal to -16, which means the equation has no real number solutions.

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Answer: The answer is 24 kilograms of the 50% silver alloy and 16 kilograms of the 25% silver alloy should be used to make 40 kilograms of the 40% silver alloy.

Step-by-step explanation:

To convert kilometers per hour (km/hr) to meters per second (m/sec), we need to multiply the speed by 0.27778.

So, to convert 81 km/hr to m/sec, we multiply it by 0.27778 as follows:

81 km/hr x 0.27778 = 22.5 m/sec (rounded to one decimal place)

Therefore, 81 km/hr is equal to 22.5 m/sec (approximately).

~~~Harsha~~~

Answer: 22.5 Meters per Second

Step-by-step explanation: 1 km/h = 0.2777777778 m/s     1 m/s = 3.6 km/h

Example: convert 20 km/h to m/s:

20 km/h = 20 × 0.2777777778 m/s = 5.5555555556 m/s

The 90% confidence that the proportion of yellow peas is between 23.5% and 29.5%

and, 25% estimate falls within the 90% confidence limits.

We have,

Green peas= 445

Yellow peas= 161

So, Total peas:

= 445 + 161

= 606.

Now, the Proportion of yellow

= 161/606

= 0.265676

= 26.56%

Now, p= 0. 265 and q= 1-0.265= 0.735

So, np = 606 (0.265)= 160.59

nq = 606(0.735) = 445.41

As, both results are ≥ 5 and the sample can be approximated by a normal distribution.

For 90% confidence, z = 1.645.

Now, the margin error

= 1.645 √ (0.265)(0.735) / 606

= 1.645 / 0.0179

= 0.0294

Now, The confidence limits are the point estimate ± the margin of error. =

= 0.265 + 0.03

= 0.295

= 29.5%;

or, 0.265 - 0.030

= 0.235

= 23.5%

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There are 264 anagrams of the word CADERNO that have vowels before consonants.

We have,

To count the number of anagrams of the word CADERNO that have vowels before consonants, we can use the following steps:

Count the number of vowels in the word.

In this case, there are three vowels: A, E, and O.

Count the number of consonants in the word.

In this case, there are four consonants: C, D, R, and N.

Determine the possible arrangements of vowels and consonants that satisfy the condition of having vowels before consonants.

Since there are three vowels and four consonants, there are two possible arrangements that satisfy this condition:

a) Vowel - Consonant - Vowel - Consonant - Vowel - Consonant - Consonant

b) Vowel - Consonant - Vowel - Consonant - Consonant - Vowel - Consonant

Calculate the number of ways to arrange the vowels and consonants in each of the possible arrangements determined in step 3.

We can use permutations to calculate this.

For arrangement a):

There are 3 ways to choose the first vowel (A, E, or O)

There are 4 ways to choose the first consonant (C, D, R, or N)

There are 2 ways to choose the second vowel (whichever is left out of the two remaining vowels)

There are 3 ways to choose the second consonant (whichever is left out of the three remaining consonants)

There is 1 way to choose the third vowel (the remaining vowel)

There is 1 way to choose the fourth consonant (the remaining consonant)

There is 1 way to choose the fifth consonant (the remaining consonant)

The total number of arrangements for this case is: 3 x 4 x 2 x 3 x 1 x 1 x 1 = 72

For arrangement b):

There are 3 ways to choose the first vowel

There are 4 ways to choose the first consonant

There are 2 ways to choose the second vowel

There are 2 ways to choose the second consonant (whichever is left out of the two remaining consonants)

There are 2 ways to choose the third consonant (whichever is left out of the two remaining consonants)

There is 1 way to choose the third vowel

There is 1 way to choose the fourth consonant

The total number of arrangements for this case is: 3 x 4 x 2 x 2 x 2 x 1 x 1 = 192

Add up the total number of arrangements for both cases to get the final answer:

72 + 192 = 264

Therefore,

There are 264 anagrams of the word CADERNO that have vowels before consonants.

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Answer:

$44

Step-by-step explanation:

since its original price is $40, you would just add 5% but since it says 5% EACH year for 2 years , it would be 10%

you would just add 40 plus %10 if im not mistaken which is $44 so the price just went up $2 each year.

sorry if im wrong.

By using the graph of y = f(x), the graph of the function g(x) = f(x + 3) include the following: D. graph D.

In Mathematics and Geometry, the translation of a graph to the left simply means subtracting a digit from the value on the x-coordinate of the pre-image.

In Mathematics and Geometry, a horizontal translation to the left is modeled by this mathematical equation g(x) = f(x + N) while a vertical translation to the positive y-direction (downward) is modeled by this mathematical equation g(x) = f(x) - N.

Where:

In order to write an equation that models the graph of g(x), we would have to apply a horizontal translation to f(x) by 3 units left:

y = f(x)

g(x) = f(x + 3)

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The population of Kentucky is nearly 5.9 times that of North Dakota.

To determine how many times larger Kentucky's population is than North Dakota's population, divide Kentucky's population by North Dakota's population:

4.47 x 10^6 / 7.62 x 10^5

We can simplify the fraction by dividing both the numerator and denominator by 7.62 x 10: 4.47 x 106 / 7.62 x 105 = 5.87

5.9, rounded to the closest tenth.

As a result, the population of Kentucky is nearly 5.9 times that of North Dakota.

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Answer:

Step-by-step explanation:

The circumference of the circle is 50.272in and the area is 3.142 x 8² = 200.96in².

The formula for circumference of a circle is given as:

  C = 2[tex]\pi[/tex]r

where r is the radius

and [tex]\pi[/tex] is 3.142

Area of a circle is given as:

   A = [tex]\pi r^{2}[/tex]

From the diagram,

diameter (d) given is 16in i.e:

d = 16in

but

r = d/2 = 16/2 = 8in

Now solve the C and A using the formula above:

C = 2 x 3.142 x 8 = 50.272in (approx.)

A = 3.142 x 8² = 200.96in² (approx.)

Briefly, a circle is a two-dimensional geometric shape consisting of all points in a plane that are a fixed distance, called the radius, from a given point called the center.

The distance around the circle, also known as its perimeter, is called the circumference.

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