Basic Mathematics for College Students

Chapter 9 Cumulative Review 841

57. SALES TAX If the sales tax rate is , how much
    sales tax will be added to the price of a new car
    selling for $18,550?[Section 6.3]


58. COLLECTIBLES A porcelain figurine, which was
    originally purchased for $125, was sold by a collector
    ten years later for $750. What was the percent
    increase in the value of the figurine?[Section 6.3]


59. TIPPING Estimate a 15% tip on a dinner that cost
    $135.88.[Section 6.4]


60. PAYING OFF LOANS To pay for tuition, a college
    student borrows $1,500 for six months. If the annual
    interest rate is 9%, how much will the student have to
    repay when the loan comes due?[Section 6.5]


61. FREEWAYS Refer to the pictograph below to
    answer the following questions.[Section 7.1]

Source: http://www.skyscraperpage.com

a. Estimate the number of vehicles that travel the

I-405 Freeway in Los Angles each day.

b. Estimate the number of vehicles that travel the

I-95 Freeway in New York each day.

c. Estimate how many more vehicles travel the

I-5 Freeway in Seattle than the I-94 Freeway in

Minneapolis each day.

62. VEGETARIANS The graph below gives the results
    of a recent study by Vegetarian Times.[Section 7.1]

Source: Vegetarian Times

Over

55 yrs

old

42%

18–34 yrs

old

40%

35–54 yrs

old

Survey Results: Ages of Adult

Vegetarians in the United States, 2008

= 50,000 vehicles

I-405 Los Angeles

I-5 Seattle

I-95 New York

I-94 Minneapolis

Freeway Traffic

Average number of vehicles daily

6 14 % a. According to the study, what percent of the adult

vegetarians in the United States are over 55 years

old?

b. The study estimated that there were 7,300,000

adult vegetarians in the United States. How many

of them are 35 to 54 years old?

63. SPENDING ON PETS Refer to the bar graph below
    to answer the following questions.[Section 7.1]
    a. In what category was the most money spent on
    pets? Estimate how much.
    b. Estimate how much money was spent on
    purchasing pets.
    c. Estimate how much more money was spent on vet
    care than on grooming and boarding.


64. TABLE TENNIS The weights (in ounces) of 8 ping-
    pong balls that are to be used in a tournament are as
    follows: 0.85, 0.87, 0.88, 0.88, 0.85, 0.86, 0.84, and 0.85.
    Find the mean, median, and mode of the weights.
    [Section 7.2]


65. Evaluate the expression for , ,

and .[Section 8.1]

66. Translate each phrase to an algebraic expression.
    [Section 8.1]
    a. 16 less than twice
    b. the product of 75 and , increased by 6


67. Simplify each expression.[Section 8.2]
    a. 12(4a) b.  2 b(7)(3)

s

x

z 4

x 2 y 3

2 x 3 y

zy

2

4

6

8

Billions of dollars

10

12

14

16

18

Source: American Pet Products Organization

Vet

care

Grooming/

boarding

Supplies/

medicine

Food Animal

purchases

Amount Spent on Pets in the U.S., 2009