Page 331 - Basic College Mathematics with Early Integers

308 C HAPTE R 4 I DECIMALS

55. A 1-ounce serving of cream cheese contains 6.2 grams 56. A 3.5-ounce serving of lobster meat contains
of saturated fat. How much saturated fat is in 4 ounces 0.1 gram of saturated fat. How much saturated fat
of cream cheese? (Source: Home and Garden Bulletin do 3 servings of lobster meat contain? (Source: The
No. 72; U.S. Department of Agriculture) National Institutes of Health)

57. Recall that the face of the Apple iPhone (see 58. Recall that the face of the Google G1 phone (see
Section 4.2) measures 4.5 inches by 2.4 inches. Find Section 4.2) measures 4.6 inches by 2.16 inches. Find
the area of the face of the Apple iPhone. the area of the face of the Google G1 phone.

59. In 1893, the first ride called a Ferris wheel was 60. The radius of Earth is approximately 3950 miles. Find
constructed by Washington Gale Ferris. Its diameter the distance around Earth at the equator. Give an
was 250 feet. Find its circumference. Give an exact exact answer and an approximation using 3.14 for p.
answer and an approximation using 3.14 for p. (Hint: Find the circumference of a circle with radius
(Source:The Handy Science Answer Book, Visible Ink 3950 miles.)
Press, 1994)

61. The London Eye, built for the Millennium 62. The world’s longest suspension bridge is the Akashi
celebration in London, resembles a gigantic Ferris Kaikyo Bridge in Japan.This bridge has two circular
wheel with a diameter of 135 meters. If Adam Hawn caissons, which are underwater foundations. If the
rides the Eye for one revolution, find how far he diameter of a caisson is 80 meters, find its
travels. Give an exact answer and an approximation circumference. Give an exact answer and an
using 3.14 for p. (Source: Londoneye.com) approximation using 3.14 for p. (Source: Scientific
American; How Things Work Today)

80 meters
Caisson

63. A meter is a unit of length in the metric system that is 64. The doorway to a room is 2.15 meters tall.
approximately equal to 39.37 inches. Sophia Wagner Approximate this height in inches. (Hint:
is 1.65 meters tall. Find her approximate height in See Exercise 63.)
inches.

65. a. Approximate the circumference of each circle. 66. a. Approximate the circumference of each circle.

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10 meters 20 meters 16 inches 32 inches

b. If the radius of a circle is doubled, is its b. If the diameter of a circle is doubled, is its
corresponding circumference doubled? corresponding circumference doubled?