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Careers<br />
AQUARIUM DIVER In<br />
addition to feeding <strong>and</strong> taking<br />
care <strong>of</strong> the fish <strong>and</strong> the plants<br />
in an aquarium, divers make<br />
sure that the tank does not<br />
get too crowded.<br />
<strong>Volume</strong> <strong>of</strong> a Cylinder Find the volume <strong>of</strong> the cylinder. Round your<br />
answer to the nearest whole number.<br />
27.<br />
4 in.<br />
28.<br />
6 m<br />
29.<br />
Swimming Pools In Exercises 30–32, find the volume <strong>of</strong> the pool.<br />
Round your answer to the nearest whole number. Then compare the<br />
volumes <strong>of</strong> the pools to answer Exercise 33.<br />
30.<br />
20 ft<br />
31.<br />
24 ft<br />
32.<br />
4 ft<br />
4 ft<br />
3 ft<br />
33. Which pool above requires the least amount <strong>of</strong> water to fill it?<br />
Visualize It!<br />
In Exercises 34 <strong>and</strong> 35, use the information below.<br />
Suppose that a 3-inch by 5-inch index card is rotated around a<br />
horizontal line <strong>and</strong> a vertical line to produce two different solids.<br />
3 in.<br />
9 in.<br />
5 in.<br />
34. Find the volume <strong>of</strong> each solid.<br />
35. Which solid has a greater volume? Explain your reasoning.<br />
Aquariums In Exercises 36 <strong>and</strong> 37, use the information below.<br />
The Giant Ocean Tank at the<br />
New Engl<strong>and</strong> Aquarium is a<br />
cylinder that is 23 feet deep <strong>and</strong><br />
40 feet in diameter as shown.<br />
23 ft<br />
36. Find the volume <strong>of</strong> the tank.<br />
37. How many gallons <strong>of</strong> water<br />
are needed to fill the tank?<br />
(1 ft 3 ≈ 7.5 gal)<br />
15 ft<br />
38. Personal Aquariums To avoid overcrowding in a personal<br />
aquarium, you should buy one fish for every gallon <strong>of</strong><br />
water (231 in. 3 ≈ 1 gal). About how many fish should be in<br />
an aquarium that is a rectangular prism measuring 20 inches<br />
wide, 10 inches long, <strong>and</strong> is filled with water to a height <strong>of</strong><br />
11 inches?<br />
3 in.<br />
5 in.<br />
40 ft<br />
12 m<br />
<strong>9.4</strong> <strong>Volume</strong> <strong>of</strong> <strong>Prisms</strong> <strong>and</strong> <strong>Cylinders</strong> 505
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