PLZZ HELP!! A spherical ball just fits inside a cylindrical can, 16 centimeters tall, with a diameter of 16 centimeters. Which expression gives the volume of the sphere in cubic centimeters?
Answers
formula for volume of a sphere is V=4/3 x pi x R63
if diameter = 16 than radius = 16/2 = 8
so the equation would be 4/3 x pi x 8^3
Answer:
Option [tex]V=\frac{4}{3}\pi (8^{3})\ cm^{3}[/tex]
Step-by-step explanation:
we know that
The volume of a sphere is equal to
[tex]V=\frac{4}{3}\pi r^{3}[/tex]
In this problem we have
[tex]r=16/2=8\ cm[/tex] -----> the radius is half the diameter
substitute
[tex]V=\frac{4}{3}\pi (8^{3})\ cm^{3}[/tex]
Related Questions
126 employees is 3% of what number of employees
Answers
"of" in mathematics usually means that the numbers or values described are being multiplied.
And so the word problem becomes:
126 employees = 3% * x employees
Solve:
126 = .03 * x
x * .03 = 126
(x * .03) / .03 = 126 / .03
x = 4200 employees
Thus your answer is 4200 employees.
If 126 is equivalent to 3%, then we can say that 126/? = 3/100, which you can then use to find the answer by doing 126 ÷ 3 = 42, and then multiplying 42 by 100 to get 4,200.
I hope this helps!
The table below shows the surface area y in square inches, of a shrinking puddle in x hours
Time (x) (hours) 2 5 8 11
Surface area (y) 25 15 9 2
(Square inches)
Part a- what is the most likely value of the correlation coefficient of the data in the table? Based on the correlation coefficient, describe the relationship between time and surface are puddle. [choose the value of the correlation coefficient from -1,-0.99,-0.5,-0.02]
Part b - what is the value of the slope of the graph of surface area versus time between 5 and 8 hours and what does the slope represent?
Part c- does the data in the table represent correlation or causation?
Answers
Correlation coefficient: -.99
This tells us that as time goes on (value of x increases) the area of the puddle goes down (value of y decreases)
Part B
y₂ - y₁
------- = slope
x₂ - x₁
9 - 15
--------
5 - 8
-6/-3 = 2
So the slope equals -2, regardless of the fact that we got 2 as an answer there, we know that it is a negative slope
Part C
The data represents causation because an increase in the value of x results in a decrease in the value of y, this shows an example of direct causation between x and y.
Answer:
Step-by-step explanation:
Given is a table showing the surface area y in square inches, of a shrinking puddle in x hours
x y
2 25
5 15
8 9
11 2
r -0.993835256
Hence correlation coefficient is option B) -0.99
Part b:
Time Sur area
x y
2 25
5 15
8 9
11 2
r -0.993835256
slope -0.395083406
Intercept 11.53731343
slope =-0.395
Between 5 and 8, slope = [tex]\frac{change in y}{change in x} \\=\frac{9-15}{8-5} \\=-2[/tex]
Slope represents the change of y with respect to 1 unit change in x.
Part c:
Yes correlation strong and negative.
Which statement is true about whether Z and B are independent events?
Z and B are independent events because P(Z∣B) = P(Z).
Z and B are independent events because P(Z∣B) = P(B).
Z and B are not independent events because P(Z∣B) ≠ P(Z).
Z and B are not independent events because P(Z∣B) ≠ P(B).
Answers
Answer:
Z and B are independent events because P(Z∣B) = P(Z).
Step-by-step explanation:
Z and B are independent events
When Z and B are independent events then
P(Z and B) = P(Z) * P(B)
P(Z∣B)= [tex]\frac{P(Z and B)}{P(B)}[/tex]
P(Z∣B)= [tex]\frac{P(Z)*P(B)}{P(B)}[/tex]
We cancel out P(B) on both sides
P(Z|B) = P(Z)
express the confidence interval 0.38 p 0.54 in the form of p^ ± e
Answers
Assume that p is in the middle of the given interval:
p = (0.54-0.38) / 2 = 0.08
Then, e can be calculated as follows:
e = end of interval - p = 0.54 - 0.08 = 0.46
The required expression can be written as follows:
p ± e = 0.08 ± 0.46
F(x) = 9 sin(x) + cot(x), −π ≤ x ≤ π find the interval of increase.
Answers
F(x) = 9 sinx + cot x
We need to take the first derivative of the given function so,
F' (x) = 9 cos x - csc² x
Next, we equate the first derivative of the function to 0 and solve for the values of x
0 = 9 cos x - csc² x
Solving for x
x = 2.04
Picking out an arbitrary value between 2.04 and π, say 3 and substituting in F(x)
F(3) = 9 sin 3 + cot 3 = 19.55
Therefore, the interval where the function is increasing is from 2.04 to π
Consequently, the interval where the function is decreasing is from -π to 2.04
Final answer:
To find the interval of increase for the function F(x) = 9*sin(x) + cot(x), we need to find where the derivative is positive. The interval of increase for the function is (0, π/2) and (π, 3π/2).
Explanation:
In order to find the interval of increase for the function F(x) = 9*sin(x) + cot(x), we need to find where the derivative is positive. Let's first find the derivative of F(x). The derivative of sin(x) is cos(x) and the derivative of cot(x) is -csc^2(x).
So, the derivative of F(x) is 9*cos(x) - csc^2(x). Now, to find where the derivative is positive, we need to find the intervals where 9*cos(x) - csc^2(x) > 0. We can solve this inequality by analyzing the sign changes of the derivative function.
By analyzing the sign changes of 9*cos(x) - csc^2(x), we find that the derivative is positive when x is in the intervals (0, π/2) and (π, 3π/2). Therefore, the interval of increase for the function F(x) = 9*sin(x) + cot(x) is (0, π/2) and (π, 3π/2).
in a grocery store steak cost $3.85 per pound if you buy a three pound steak and pay for it with a $20 bill how much change will you get
Answers
The change to be recieved is equal to $8.45
What is the unitary method?The unitary method is a method in which you find the value of a unit and then the value of a required number of units.
Given here: The price per steak is given as $3.85 per pound.
Thus 3 pound of steak will cost 3×3.85=$11.55
Therefore the change to be recieved is =20-11.55
=$8.45
Hence, The change to be recieved is equal to $8.45
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Six nickel is what Percent of a dollar
Answers
6 nickels equal 30 pennies, and 100 pennies make up a dollar.
30/100 = 30%.
factor out the polynomial: 12x^2+26x+12
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Chin Woo bought a home for $160,000. He put down 20%. The mortgage is a 8 1/2% for 25 years. His yearly payments are?
Answers
160,000−160,000×0.2=128,000
Now use the formula of the present value of annuity ordinary to find the yearly payment
The formula is
Pv=pmt [(1-(1+r)^(-n))÷r]
Pv present value 128000
PMT yearly payment?
R interest rate 0.085
N time 25 years
Solve the formula for PMT
PMT=pv÷[(1-(1+r)^(-n))÷r]
PMT= 128,000÷((1−(1+0.085)^(
−25))÷(0.085))
=12,507.10 ....answer
A trinomial that contains the variable k the coefficient of the second degree term is 1, the coefficient of the first degree term is -7 and the constant term is -15 how would you write this?
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Mr.matt plans to invest 7,500 in a savings account that earns 2.75% simple anual interest.if he makes no deposits or withdrawal ls how much money will his account be worth after 10 years
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Solve for x. Show your work.
- x < -12
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Using the law of sines in ABC, if c =135, b =10 degrees, c =45 find measure of A
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make sure your calculator is in Degree mode.
There are 375 books sold at Sid's Bookstore. The table below summarizes these books by genre. This info is presented in circle graph. Find the central angle measure for Self Help slice in graph. Mystery 99, romance 81, self help 90, cooking 57, biography 48.
Answers
The central angle measure for the 'Self Help' slice in the circle graph is 86.4 degrees.
To find the central angle of the 'Self Help' slice in a circle graph (pie chart), we first need to calculate the total number of books sold, which is provided as 375.
We then take the number of 'Self Help' books which is 90, and determine what fraction of the total this represents. The fraction for 'Self Help' books is 90/375. A full circle has an angle of 360 degrees, so we multiply the fraction by 360 to find the central angle for that section of the pie chart.
= (90/375) * 360 = 0.24 * 360 = 86.4 degrees
Thus, the central angle measure for the 'Self Help' slice in the graph is 86.4 degrees.
Add 2 then add 4! I dont get it at all plz help!
Answers
x+2+4
We can find this by breaking apart the question. Since we are not given a variable, we can assume x. Then, you can reference "add 2" for where I got the "+2." Finally, you can see the "add 4," which is where I got the "+4."
If the question is referring to simple addition, you can simply add these numbers together. If you are really struggling, you should use a calculator and input these values. To improve your basic addition skills, you can practice with the popular elementary "finger-counting method" where you hold up the value of one of the numbers on one hand, and the other value on the other hand, and then count how many fingers are up.
If you need any further explanation, please let me know and I will be happy to assist you! :)
find the x intercepts of the parabola with vertex (5,-12) and y intercept (0,63)
Answers
Final answer:
To find the x-intercepts of the parabola with vertex (5,-12) and y intercept (0,63), substitute the vertex values into the equation of the parabola and find the value of the constant. Then, substitute the value of the constant back into the equation and solve for x to find the x-intercepts. The x-intercepts of the parabola are x = 3 and x = 7.
Explanation:
To find the x-intercepts of the parabola with vertex (5,-12) and y-intercept (0,63), we need to find the values of x when y is equal to zero. Since the vertex of the parabola is (5,-12), the equation of the parabola can be written as[tex]y = a(x-5)^2 - 12.[/tex] To find the value of a, we can use the y-intercept (0,63) by substituting the values of x and y into the equation.
[tex]63 = a(0-5)^2 - 12[/tex]
63 = 25a - 12
25a = 75
a = 3
Now that we have the value of a, we can substitute it back into the equation and solve for the x-intercepts:
[tex]0 = 3(x-5)^2 - 12[/tex]
[tex]3(x-5)^2 = 12[/tex]
[tex](x-5)^2 = 4[/tex]
x-5 = ±2
x = 5 ± 2
Therefore, the x-intercepts of the parabola are x = 3 and x = 7.
Mount Rushmore is a sculpture that was carved using a model with a scale of 1 in :1 ft. If the model of George Washington’s face was 5 ft, how tall was the face on the actual sculpture? a. 5 ft c. 60 ft b. 40 ft d. 72 ft
Answers
The face on the actual sculpture of George Washington’s is 60 feet .
What is scale factor?The scale factor is a measure for similar figures, who look the same but have different scales or measures. Suppose, two circle looks similar but they could have varying radii. The scale factor states the scale by which a figure is bigger or smaller than the original figure.
According to the question
Mount Rushmore is a sculpture that was carved using a model with a scale factor of 1 in = 1 ft.
As we know
1 feet = 12 inches
i.e
Scale factor is 12 for sculpture .
Now,
The model of George Washington’s face was 5 ft
As Scale factor is 12
So, the face on the actual sculpture
5 * 12 = 60 feet
Hence, the face on the actual sculpture of George Washington’s is 60 feet .
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A seven
digit number has a 0 in the ones place,as 6 in the tens thousands place,an 8 in the millions place,and fives in each of the remaining places .what is the number
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The standard error of the estimate, sest, is essentially the
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Chris can be paid in one of two ways. Plan A is a salary of $350 per month, plus a commission of 7% of a sales. pLan B is a salary of $436 per month, plus a commission of 5% of sales. For what amount of sales is Chris better off selecting plan A
Answers
now, on Plan B, he gets 436 plus 5% of "x", 5% of "x" is (5/100) * x, or 0.05x
he's better off with A, only if A is greater than B, namely, A > B
[tex]\bf A\ \textgreater \ B\implies 350+0.07x\ \textgreater \ 436+0.05x \\\\\\ 0.07x-0.05x\ \textgreater \ 436-350\implies 0.02x\ \textgreater \ 86\implies x\ \textgreater \ \cfrac{86}{0.02}[/tex]
and surely you know how much that is.
The revenue in dollars of a company that produces jeans can be modlelded by 2x^2+17x-175 the cost In dollars of producing the jeans can be modeled by 2x^2-3x-125 the number of jeans that have been sold is represented by x the profit is the difference between revenue and cost 20x-50 if 75 pairs of jeans are sold what's the company's profit
Answers
replace x with 75
20x-50 becomes
20(75)-50
20*75 = 1500-50 = 1450
the profit was $1450
Answer:
B
Step-by-step explanation:
Can the side lengths of 12, 15, and 13 form a triangle?
Yes
No
Answers
If a wheel with a radius of 80 inches spins at a rate of 50 revolutions per minute, find the approximate linear velocity in miles per hour.
Answers
let A be the point where the circle (the wheel) touches the ground. One revolution is completed when A is back on the ground. This happens after all the points in the circumference, have touched the ground.
So one revolution means 1 circumference, which is equal to one 2πR.
50 revolutions per minute means the velocity is 50*2πR inches per 1 minute.
50*2πR=50*2*3.14*80 (inches) = 25,120 inches per minute.
1 foot is 12 inch, so 25,120 inches are [tex] \frac{25,120}{12} =2093.3 [/tex] feet
1 mile is 5280 feet so 2093.3 feet are [tex] \frac{2093.3}{5280}= 0.4[/tex] mile
now we convert minutes to hour: 1 hour = 60 min, so 1 min=1/60 hour
finally:
velocity= [tex] \frac{0.4miles}{1/60 hours}= 0.4*60 mi/h=4*6 mi/h= 24 mi/h[/tex]