There will be about 105.28 pounds of radioactive material in the concrete vault after 140 years.
The function [tex]A = A_0e^{(-0.0077x)}[/tex] gives the amount A of the radioactive material, where A0 is the initial amount of the material, x is the number of years since it was put in the vault, and e is the mathematical constant approximately equal to 2.71828.
We are given that the initial amount of material put into the vault is 300 pounds.
Therefore, [tex]A_0 = 300[/tex].
We want to find the amount of material that will be left after 140 years. Therefore, x = 140.
Substituting these values into the function, we get:
[tex]A = A0e^{(-0.0077x)}\\A = 300e^{(-0.0077 * 140)}\\A = 105.28[/tex]
Therefore, after 140 years, approximately 105.28 pounds of radioactive material will be left in the concrete vault.
Learn more about function here:
https://brainly.com/question/29633660
#SPJ1
Maria is creating a new art piece on canvas. (The canvas is represented in the picture below as
rectangle ARTS). She knows the base edge of the canvas, ST, measures 4 ft. And the distance of
diagonal AT measures 8.5 ft. What is the area of Maria’s canvas? Show all work.
The Area of Maria's canvas is 30 ft.
Area of Maria's canvas, we need to know the length of the other side of the rectangle. We can use the Pythagorean theorem to find this length. Let's call it SA.
According to the problem statement, the base edge ST measures 4 ft, and the diagonal AT measures 8.5 ft. Using the Pythagorean theorem, we have:
[tex]AT^2 = ST^2 + SA^2\\8.5^2 = 4^2 + SA^2\\72.25 = 16 + SA^2\\56.25 = SA^2\\SA = \sqrt{56.25}\\SA = 7.5\ ft[/tex]
Now we know that the length of the canvas is 7.5 ft, and the width is 4 ft. Therefore, the area of Maria's canvas is:
Area = length x width
Area = 7.5 ft x 4 ft
Area = 30 square feet
Therefore, the area of Maria's canvas is 30 square feet.
Learn more about Area here:
https://brainly.com/question/27683633
#SPJ1
Can someone help with this?
Answer: the real zero of this equation is 5/3.
Please help and explain PLEASE HELP PLEASE :( Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help
Answer:
C. 10
Step-by-step explanation:
You want to know the bin size in a histogram with bin boundaries 10.5, 20.5, 30.5, ....
Bin sizeThe size of the bin is the difference between its boundary values. Here, all of the bins are the same size:
20.5 -10.5 = 10
The bin size is 10.
__
Additional comment
The bin boundaries are typically chosen so that no data value can fall on the boundary, but must be unambiguously allocated to one bin or another. When the data values are integers, it is not uncommon to have the bin boundary be halfway between two integers.
Here, the boundary being 20.5 means a score of 20 will be counted in the bin to the left, and 21 will be counted in the bin to the right.
The boundary value shown at the right edge of the graph is not 100.5, as we might expect. However, we can reasonably assume that a test score of 100 would be counted in the bin with upper boundary 100, without any ambiguity.
Answer: 10
Step-by-step explanation:
The size of each value marker
what is the area of triangle ADC, if A is (-1, 3), D is (-1, 7), and C is (0, 4)?
Answer:
e
Step-by-step explanation:
g
Garnier's Opera House is a revival of the________style.
Romantic
Gothic
Renaissance
Baroque
Answer: Garnier's Opera House is a revival of the Baroque style.
What is the range of |x|-7?
Answer:
3 2/5 +(3/2+3/5)×6/5÷3/2-10 1/2× 2/2
Talk about an experience outside of academia where you had to assess and make a decision that came with risk. Please limit your response to 250 words or less.
An experience that I had outside the academia was when I worked as a marketing coordinator for a small start-up company.
What was the experience?A product launch event had been planned by the team for several weeks, and everything appeared to be going according to plan. However, we learned the day before the event that our keynote speaker, who was an important component of it, had unexpectedly become unwell and would not be able to attend.
I had to evaluate the situation as the marketing coordinator and decide right away. Either we could cancel the event or we could locate a another speaker.
Learn more about academia:https://brainly.com/question/30146443
#SPJ1
solve for x
2x^2/3+9x^1/3= -4
The solution of the equation is x=0.08813 or 3.90664.
We have,
2x² / 3 + 9[tex]x^{1/3[/tex] = -4
Now, solving the equation for x
2x² + 27[tex]x^{1/3[/tex] = -12
Now, taking cube on both side we get
(2x² + 27[tex]x^{1/3[/tex] )³= -12³
Now, simplifying we get
19683x = -1728 -864x² -144[tex]x^4[/tex]-8[tex]x^6[/tex]
So, x=0.08813 or 3.90664
Learn more about Equation here:
https://brainly.com/question/29657983
#SPJ1
Gwen has $50 in a savings account that earns 5% annually. The interest is not compounded. How many years will it take for her to have $57.50 in her
account?
Answer:
3 years
Step-by-step explanation:
1. Find 5 percent of 50.
5 percent of 50 is 2.5.
However, we are talking about money so we will say 2.50.
2. Add to 50 until you reach your desired number.
50 + 2.50 = 52.50
52.50 +2.50 = 55
55+2.50 = 57.50
Finally we have reached 57.50. It took us 3 equations to get there and therefore took 3 years.
the amount harry is paid each day, f(x), is a function of the number of hours, x, he works. the function f(x)=10x+25 models this situation. harry can work, at most, 4 hours each day. what is the best domain of the function in this context?
The total amount paid to harry in past week, is 299.28.
We know that,
Amount is the sum or the total value.
For example, if A purchase 2 kg rice at the price of 40 rs/kg, the amount will be 40×2= 80 rs.
Given that,
The amount paid to Harry for 1 hour = $8.60
Since, Harry worked for 33 hours,
So, The amount paid to Harry for 33 hours = 8.60×33=283.8
Harry gets half times more amount than hourly rate and also gets bonus for last 3 days
So for last 3 days the extra amount paid to Harry
= 3×1/2×8.60+3×1/10×8.60
= 12.9+2.58
=15.48
So the total amount paid to harry = 283.8+15.48=299.28
To know more about amount on :
brainly.com/question/28244711
#SPJ1
complete question:
Harry is paid £8.60 per hour for the first 30 hours he works each week. After 30 hours he is paid 1 and a half times the hourly rate.
Last week Harry worked 33 hours. He was also paid a bonus of 1/10 of his earnings
Calculate how much in total Harry was paid last week
Find the maximum value of C=4x+2y subject to the following restraints x>2 x<5 y>1 y<6
The required maximum value of C is 16, and it occurs when x = 3 and y = 2.
To find the maximum value of C = 4x + 2y subject to the restraints x > 2, x < 5, y > 1, and y < 6, we can use the method of Lagrange multipliers.
First, we set up the Lagrangian function L as follows:
L = 4x + 2y - λ₁(x - 2) - λ₂(x - 5) - λ₃(y - 1) - λ₄(y - 6)
where λ1, λ2, λ3, and λ4 are Lagrange multipliers.
Next, we take the partial derivatives of L with respect to x, y, λ1, λ2, λ3, and λ4, and set them equal to zero:
∂L/∂x = 4 - λ₁ - λ₂ = 0
∂L/∂y = 2 - λ₃ - λ = 0
∂L/∂λ₁ = x - 2 = 0
∂L/∂λ₁ = 5 - x = 0
∂L/∂λ₃ = y - 1 = 0
∂L/∂λ₄ = 6 - y = 0
Solving these equations simultaneously, we get:
λ₁ = 1, λ₂ = 3, λ₃ = 1, λ₄ = 1, x = 3, y = 2
Therefore, the maximum value of C is:
C = 4x + 2y = 4(3) + 2(2) = 16
So, the maximum value of C is 16, and it occurs when x = 3 and y = 2.
Learn more about Lagrange multipliers here:
https://brainly.com/question/30776684
#SPJ1
The Mackinac Bridge in Michigan is 1158 meters long. The Tsing Ma Bridge in Hong Kong is 97 meters longer than the Golden Gate Bridge in California. Together, all three bridges have a length of 3815 meters. How long is the Tsing Ma Bridge?
Lenght of Tsing Ma Bridge in Hong Kong is, 1,377 meters
Given that;
The Mackinac Bridge in Michigan is 1158 meters long.
And, The Tsing Ma Bridge in Hong Kong is 97 meters longer than the Golden Gate Bridge in California.
Let the length of Golden Gate Bridge = x
Then, Lenght of Tsing Ma Bridge in Hong Kong = x + 97
Since, Together, all three bridges have a length of 3815 meters.
Hence, We get;
1158 + x + (x + 97) = 3815
1255 + 2x = 3815
2x = 2,560
x = 1,280 meters
Thus, Lenght of Tsing Ma Bridge in Hong Kong = x + 97
= 1280 + 97
= 1,377 meters
Learn more about the mathematical expression visit:
brainly.com/question/1859113
#SPJ1
A closet in Shivani's house is 2 yards by 1 yard. How much would it cost to put a new floor in the closet if the flooring costs $38.00 per square yard?
The amount it would cost to put a new floor in the closet is $76.00
Calculating how much it would cost to put a new floor in the closetFrom the question, we are to calculate how much it would cost to put a new floor in the closet
From the given information,
A closet in the house is 2 yards by 1 yard.
To determine how much it would cost to put a new floor in the closet,
First,
We calculate the area of the closet
Area of the closet = 2 yard × 1 yard
Area of the closet = 2 square yards
Now,
From the given information,
The flooring costs $38.00 per square yard
Thus,
The amount it would cost to put a new floor in the closet is
2 × $38.00
= $76.00
Hence,
The amount it would cost is $76.00
Learn more on Calculating cost here: https://brainly.com/question/1662561
#SPJ1
The measure of weights of 15 students is normally distributed with a sample mean of 6 and standard deviation of 5. Find the 95% confidence interval for the mean.
The 95% confidence interval for the mean is [3.23, 8.76].
What is the confidence of interval?
The confidence of interval of the mean is calculated as follows;
Confidence interval = σ ± (t-value x μ)
where;
σ is the sample meanμ is the standard errorThe standard error is calculated as follows:
μ = std / √n
μ = 5 / √15
μ = 1.29
Based on this value we will check the distrbution table, for the t-value of 95% confidence;
= 2.145.
Confidence interval = σ ± (t-value x μ)
= 6 ± (2.145 x 1.29)
= [3.23, 8.76]
Learn more about confidence interval here: https://brainly.com/question/20309162
#SPJ1
Yoshi is driving across the United States. If Yoshi's map is 20 inches across, and the United States is 3,000 miles across, what is the scale of the map?
Find each angle and arc measure.
⌢
mDGF= degrees
(50 POINTs will give BRAINIEST FOR EFFORT)
Answer: 226
Step-by-step explanation:
The angle is half of the arc angle
so mDGF is 2 times as big as the angle
mDGF=113*2
mDGF=226
An ordinary fair dice is a cube with the numbers 1 through 6 on the sides
The probability values are P(A) = 0.722 and P(B) = 0.50
Calculating the probability valuesFrom the question, we have the following parameters that can be used in our computation:
A fair die
The sample space of the events are
A = Sum is greater than 5
B = Sum is an even number
From the sample space of the sum of outcomes, we have
n(A) = 26
n(B) = 18
So, we have
P(A) = 26/36 = 0.722
n(B) = 18/36 = 0.50
Read more about probability at
https://brainly.com/question/24756209
#SPJ1
In order to estimate the average electric usage per month, a sample of 121 houses was selected and the electric usage was determined. Assume a population standard deviation of 370 kilowatt-hours. The standard error is 33.64. Find the size of the margin of error at 95% confidence.
a. 1.64
b. 1.96
c. 55.33
d. 65.93
If the standard error is 33.64, the size of the margin of error at 95% confidence is 65.93. So, correct option is D.
The margin of error (ME) can be calculated using the formula:
ME = z* (standard error)
where z is the z-score from the standard normal distribution corresponding to the desired level of confidence. For 95% confidence, z is 1.96.
Substituting the values given in the problem, we have:
ME = 1.96 * 33.64 = 65.93
Therefore, correct option is D.
This means that if we take multiple random samples of size 121 from the population, and calculate the sample mean and confidence interval for each sample, we can expect the true population mean to fall within 65.93 units above or below the sample mean, 95% of the time.
To learn more about population click on,
https://brainly.com/question/15099929
#SPJ1
I don’t understand this problem
The area of the composite figure is equal to 521.080 square milimeters.
How to determine the area of a composite figure
In this problem we have the representation of a composite figure, whose area should be found. This figure is the consequence of the combination of three figures: a semicircle, a rectangle and a triangle. The area formulas for each case are introduced below:
Semicircle
A = 0.5π · r²
Where r is the radius, in milimeters.
Rectangle
A = b · h
Triangles
A = 0.5 · b · h
Where:
b - Base, in milimeters.h - Height, in milimeters.A - Area, in square milimeters.Now we proceed to compute the area of the composite figure:
A = 0.5π · (10 mm)² + (20 mm) · (14 mm) + 0.5 · (12 mm) · (14 mm)
A = 50π mm² + 280 mm² + 84 mm²
A = 521.080 mm²
RemarkThe statement is absent. Complete statement is introduced below:
Find the area of the figure.
To learn more on areas of composite figures: https://brainly.com/question/23718948
#SPJ1
Write each number in scientific notation
Answer:
There is nothing to write about my brother
Step-by-step explanation:
There is a scientific notation moment when shrek had to hit the griddy and said "i said right foot creep"
What transformations take the graph of f(x) = e^x to f(x) = -e^x -2?
The transformations of the given functions is vertical shift 2 units down.
Given that, the function is f(x)=-eˣ to f(x)=-eˣ-2.
To find the transformation, compare the function to the parent function and check to see if there is a horizontal or vertical shift, reflection about the x-axis or y-axis, and if there is a vertical stretch.
Parent Function: f(x)= −eˣ
Horizontal Shift: None
Vertical Shift: Down 2 Units
Reflection about the x-axis: None
Vertical Compression or Stretch: None
Therefore, the transformations of the given functions is vertical shift 2 units down.
Learn more about the transformation here:
https://brainly.com/question/11709244.
#SPJ1
Which of the following represents the symmetric property of equality?
A) If a = b and b = c, then a = c
B) If a = b, then ac = bc
C) If a = b, then b = a
D) a(b + c) = ab + ac
Answer:
C) a = b ⇒ b = a
Step-by-step explanation:
You want to identify the statement that represents the symmetric property of equality.
A.If a = b and b = c, then a = c. This is the transitive property of equality.
B.If a = b, then ac = bc. This is the multiplication property of equality.
C.If a = b, then b = a. This is the symmetric property of equality.
D.a(b +c) = ab +ac. This is the distributive property of multiplication over addition.
1-The tangent line to the curve y = x³ at point A(a, a³) intersects the curve at point B. Let
R be the area of the region bounded by the curve and the tangent line. The tangent line at B
intersects the curve at another point C. Let S be the area of the region bounded by curve and
the second tangent line. How are the areas R and S related?
Answer:
The areas R and S are equal.
Step-by-step explanation:
Since, the tangent line to the curve y = x³ at point A(a, a³) is given by y = 3a²(x - a) + a³. This line intersects the curve at point B(a, a³), and we can find the x-coordinate of point B by setting y = 3a²(x - a) + a³ equal to x³ to get the equation x³ - 3a²x + 3a³ - a³ = 0. Using the fact that x = a is a root of this equation, we can factor it as (x - a)³ = 0, which implies that the curve and the tangent line are tangent at point B.
The slope of the tangent line at point B is 3a², so the equation of the tangent line at point B is y = 3a²(x - a) + a³. This line intersects the curve at another point C, and we can find the x-coordinate of point C by setting y = 3a²(x - a) + a³ equal to x³ to get the equation x³ - 3a²x + 3a³ - a³ = 0. Using the fact that x = a is a root of this equation, we can factor it as (x - a)³ = 0, which implies that the curve and the tangent line are tangent at point C.
The region bounded by the curve and the tangent line at point A is a triangle with base a - (a - a) = 0 and height a³ - a³ = 0, so its area is 0. The region bounded by the curve and the tangent line at point B is a triangle with base a - a = 0 and height a³ - a³ = 0, so its area is also 0. Therefore, the areas R and S are both equal to 0, which means they are equal to each other.
In Martha's food storage, she has 13 cans of chicken noodle soup, 15 cans of tomato soup, and 17 cans of mushroom soup. If she randomly chooses a can of soup from her food storage, what is the probability it is a can of tomato soup?
Answer:
1/3
Step-by-step explanation:
p(event) = (number of desired outcomes)/(total number of outcomes)
total number of outcomes = 13 + 15 + 17 = 45
number of desired outcomes = 15
p(can of tomato soup) = 15/45 = 1/3
Which of the following ratios would form a proportion with Two-thirds?
a.
Three-fourths
c.
StartFraction 12 Over 15 EndFraction
b.
StartFraction 6 Over 9 EndFraction
d.
One-third
The proportion equivalent with Two-thirds would be 6/9.
Since we know that the proportion is a fraction of a total amount, and the measures are related using a rule of three.
The relations between variables, either direct or inverse proportional, can be built to find the desired measures in the problem.
We are given that the proportion with Two-thirds
If you actually divide it’ll make since , so first we want to divide the 2 , then you want to multiply the third of the two
2/3 x 3/3
6/9
thus, the answer will be 6/9.
More can be learned about proportions at;
brainly.com/question/24372153
#SPJ1
Please help me out! :D
Answer:
A
Step-by-step explanation:
(x)<0 over and what other interval?
The other interval is (-1.1, 0.9)
In a graph of any function, values of f(x) are represented by the values on the y-axis for the different input values on x-axis.
For the given graph, values of f(x) are less than zero.
That means interval in which the values of the function are negative for the different values of x.
Negative values of the given function are in the intervals (-∞, -3), (-1.1, 9).
Therefore, from the given options, Option (4) will be the answer.
Learn more about intervals, click;
https://brainly.com/question/30486507
#SPJ1
The complete question is
F(x)<0 over (-∞, -3) and what other interval?
O (-2.4, - 1.1)
O (-3, - 1.1)
O (-1.1, 2)
O (-1.1, 0.9)
In 2009 the world’s largest pumpkin weighed 784 kilograms. An average-sized pumpkin weights 5,000 grams. The 2009 world record pumpkin weighs___ kilograms more than and average sized pumpkin. Write your answer as a numeral.
Step-by-step explanation:
5 000 gm = 5 kg
784kg - 5kg= 779 kg more than average
(2/5)y-5=-2.5
What's y
Answer: Y = 6.5
Step-by-step explanation:
Applying the Right Triangle Altitude Theorem. Which similarity statement is true?
The true similarity statement are using Right Triangle Altitude Theorem :
ΔABD similar to ΔBCD
ΔABC similar to ΔADB
ΔABC similar to ΔBDC
Two triangles are said to be similar if the triangles are of the same shape but different size. The angles of the triangle will be equal and the sides are proportional.
By the Right Triangle Altitude Theorem,
If the altitude of a triangle is drawn to the hypotenuse of a right angled triangle, then the triangles formed by the division are similar to each other and both are similar to the original triangle.
Using this,
ΔABD similar to ΔBCD
ΔABC similar to ΔADB
ΔABC similar to ΔBDC
Hence the true statements are ΔABD similar to ΔBCD, ΔABC similar to ΔADB, ΔABC similar to ΔBDC.
Learn more about Similar Triangles here :
https://brainly.com/question/14926756
#SPJ1
The complete question is given below.