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Flura [38]
3 years ago
5

the new dolphin tank at the aquarium has a radius of 75 feet and a height of 20 feet. what is the volume of the dolphin tank? ro

und to the nearest tenth. use 3.14 for pie
Mathematics
2 answers:
Semmy [17]3 years ago
6 0
Solutions 

 V=3.14r^2 * 20 

Radius = 75 

3.14 * 75^2 * 20 

3.14 * 5625 * 20 
 
17662.5 * 20 

= 353,250 feet cubed  



ohaa [14]3 years ago
3 0

Answer:

353,250.0 cubic feet

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The area of a triangle is 56.4cm and the base is 12cm.What is the height of the triangle?
ale4655 [162]

area of a triangle = 1/2 base x height

56.4 = 1/2 x 12 x height

56.4 = 6 x height

height = 56.4 /6 = 9.4cm


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Jane has 312 feet of fencing to use to enclose a rectangular garden. She wants the garden to be 5 times as long as it is wide. W
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3 years ago
The National Center for Educational Statistics surveyed 5400 college graduates about the lengths of time required to earn their
fenix001 [56]

Answer:

The 90% confidence interval for the mean time required by all college graduates is between 5.36 years and 5.44 years.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.9}{2} = 0.05

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.05 = 0.95, so z = 1.645

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 1.645*\frac{1.9}{\sqrt{4500}} = 0.04

The lower end of the interval is the sample mean subtracted by M. So it is 5.4 - 0.04 = 5.36 years.

The upper end of the interval is the sample mean added to M. So it is 5.4 + 0.04 = 5.44 years.

The 90% confidence interval for the mean time required by all college graduates is between 5.36 years and 5.44 years.

3 0
3 years ago
Which of the students found the correct value of their expression? Select all that are true. None of the students Student 2 Stud
Mariulka [41]

Answer:

Step-by-step explanation:

Student 2 and student 1

6 0
2 years ago
So i am dealing with equations with triangles, complimentary and supplementary, so what is 42 square + x = 180, so what is the n
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-1584.
multiply 42 times 42 the subtract that from 180
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3 years ago
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