Page 228 - Basic College Mathematics with Early Integers

S E C T I O N 3.3 I MULTIPLYING AND DIVIDING FRACTIONS 205

3
69. The Oregon National Historic Trail is 2170 miles 70. Each turn of a screw sinks it of an inch deeper
16
long. It begins in Independence, Missouri, and ends into a piece of wood. Find how deep the screw is
in Oregon City, Oregon. Manfred Coulon has hiked
2
of the trail before. How many miles has he hiked? after 8 turns.
5
(Source: National Park Service)

Oregon City
3 inch
16
Independence

71. The radius of a circle is one-half of its diameter, as 72. The diameter of a circle is twice its radius, as shown
3 in the Exercise 71 illustration. If the radius of a circle
shown. If the diameter of a circle is of an inch,
8 7
what is its radius? is of a foot, what is its diameter?
20

diameter
radius

3
73. A special on a cruise to the Bahamas is advertised to 74. A family recently sold their house for $102,000, but
50
2
be of the regular price. If the regular price is $2757, of this amount goes to the real estate companies that
3
helped them sell their house. How much money does
what is the sale price?
the family pay to the real estate companies?

1
75. The state of Mississippi houses of the total U.S. 76. There have been about 285 different contestants on
184 the reality television show Survivor over 17 seasons.
libraries. If there are about 9200 libraries in the
Some of these contestants appeared in two different
United States, how many libraries are in Mississippi?
series and/or seasons. If the number of returning
2
contestants was of the total number of participants
19
in the first 17 seasons, how many contestants
participated more than once? (Source: Survivor.com)

#
Find the area of each rectangle. Recall that area = length width
77. 78. q mile

Q foot
≈ mile

5
14 foot