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IStudent Help<br />
I CLASSZONE.COM<br />
HOMEWORK HELP<br />
Extra help with problem<br />
solving in Exs. 19–21 is<br />
at classzone.com<br />
Civil Engineering<br />
SOO LOCKS The first locks<br />
system between Lake Superior<br />
<strong>and</strong> Lake Huron was built<br />
around 1797. Today, four locks<br />
are available in the Soo Locks<br />
system.<br />
504 Chapter 9 Surface Area <strong>and</strong> <strong>Volume</strong><br />
Finding <strong>Volume</strong> Find the volume <strong>of</strong> the combined prisms.<br />
19.<br />
3 ft<br />
20. 6 in.<br />
21. 2 m<br />
2 in.<br />
5 m<br />
8 ft<br />
1 in.<br />
2 ft<br />
4 in.<br />
2 ft 5 ft<br />
Shopping In Exercises 22–24, use the information about the sizes <strong>of</strong><br />
the cereal boxes shown below.<br />
22. Find the volume <strong>of</strong> each box <strong>of</strong> cereal.<br />
23. How many small boxes<br />
<strong>of</strong> cereal do you have to<br />
buy to equal the amount<br />
<strong>of</strong> cereal in a large box?<br />
24. Which box gives you the<br />
most cereal for your<br />
money? Explain.<br />
Soo Locks In Exercises 25 <strong>and</strong> 26, use the information below.<br />
Lake Superior is about 22 feet higher than Lake Huron. In order for<br />
ships to safely pass from one lake to the other, they must go through<br />
one <strong>of</strong> the four Soo Locks.<br />
Lake<br />
Huron<br />
22 ft<br />
Lake<br />
Huron<br />
2 in.<br />
25. Water is added to the MacArthur Lock until the height is increased by<br />
22 feet. To find the amount <strong>of</strong> water added to the lock, find the volume<br />
<strong>of</strong> a rectangular prism with a length <strong>of</strong> 800 feet, a width <strong>of</strong> 80 feet, <strong>and</strong> a<br />
height <strong>of</strong> 22 feet.<br />
1 in.<br />
8 in.<br />
Top View<br />
lower gates<br />
80 ft<br />
Side View<br />
upper gates<br />
800 ft<br />
$2.00 $2.00<br />
Not drawn to scale<br />
26. How many gallons <strong>of</strong> water are added to the MacArthur Lock<br />
to raise the ship to the level <strong>of</strong> Lake Superior? Use the fact that<br />
1 ft 3 ≈ 7.5 gal.<br />
Whole Whole<br />
Grain Grain<br />
Cereal<br />
Part <strong>of</strong> a well balanced breakfast<br />
Nutrition Facts<br />
Serving Size 1 bowl<br />
Serving per container<br />
Amount per serving<br />
Calories 45<br />
%Daily Value<br />
Total Fat 0g<br />
Saturated Fat 0g<br />
Cholesterol 0mg<br />
Sodium 0mg<br />
Carbohydrate 2g<br />
Dietary Fiber 0g<br />
Sugars 0g<br />
Protein less than 1g<br />
Vitamin A ***<br />
Calcium ***<br />
Vitamin C ***<br />
Iron ***<br />
*****<br />
******************<br />
******************<br />
10 in.<br />
2 in.<br />
Whole Whole<br />
Grain Grain<br />
7 m<br />
10 in.<br />
$6.00<br />
Cereal<br />
Part <strong>of</strong> a well balanced breakfast<br />
Nutrition Facts<br />
Serving Size 1 bowl<br />
Serving per container<br />
Amount per serving<br />
Calories 45<br />
%Daily Value<br />
Total Fat 0g<br />
Saturated Fat 0g<br />
Cholesterol 0mg<br />
Sodium 0mg<br />
Carbohydrate 2g<br />
Dietary Fiber 0g<br />
Sugars 0<br />
Protein less than 1g<br />
Vitamin A ***<br />
Calcium ***<br />
Vitamin C ***<br />
Iron ***<br />
*****<br />
******************<br />
******************<br />
10 m<br />
16 in.<br />
4 in.<br />
4 m<br />
Lake<br />
Superior<br />
Lake<br />
Superior
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