Page 591 - Basic College Mathematics with Early Integers

568 C HAPTE R 8 I INTRODUCTION TO ALGEBRA

89. Find the area of a circular braided rug with a radius of 90. Mario’s Pizza sells one 16– cheese pizza or two 10–
5 feet. Use A = pr 2 and p L 3.14. cheese pizzas for $9.99.Which deal gives you more
pizza? Use A = pr 2 with p L 3.14.
16 inches 10 inches 10 inches

5 feet

For Exercises 91 through 94, use the given formulas (equations whose variables have a special meaning) to solve.

91. How much interest will $3000 in a passbook savings 92. How much interest will a $12,000 certificate of deposit
account earn in 2 years at Money Bank, which pays earn in 1 year at a rate of 8% simple interest? Use
6% simple interest? Use I = prt. I = prt.

93. Convert Paris, France’s, low temperature of -5°C to 94. Convert Nome,Alaska’s, 18°F high temperature to
9 5
Fahrenheit. Use F = C + 32. Celsius. Use C = 1F - 322.
5 9
Exercises 95–98 have to do with volume.Volume is the measure of the space of a solid. It is measured in cubic units and
we will study volume further in Chapter 9.

95. Find the volume of a box that measures 12 inches by 96. How many cubic meters does a space shuttle cargo com-
6 inches by 4 inches. Use V = lwh. partment have if its dimensions are 8 meters long by
4 meters wide by 3 meters high? Use V = lwh.

97. Find the volume. Use V = lwh. 98. Find the volume. Use V = lwh.

4x in.
4 cm

3 in. 7.6 in.
2 cm 5.7x cm

Review

Perform each indicated operation. See Sections 2.3 and 2.4.

99. -13 + 10 100. -15 + 23 101. -4 - 1-122

102. -7 - 1-42 103. -4 + 4 104. 8 + 1-82

Concept Extensions

If the expression on the left side of the equal sign is equivalent to the right side, write “correct.” If not, write “incorrect”
Copyright 2012 Pearson Education, Inc.
and then write an expression that is equivalent to the left side. See the second Concept Check in this section.
2x 2y
#
105. 513x - 22 15x - 2 106. 21xy2

107. 7x - 1x + 22 7x - x + 2 108. 41y - 32 + 11 4y - 3 + 11