7th Grade Math

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Test Practice 669


  1. A shoe store had to increase prices. The
    table shows the regular price r and the new
    price n of several shoes. Which of the
    following formulas can be used to
    calculate the new price?


Shoe Regular Price (r) New Price (n)

A $25.00 $27.80
B $30.00 $32.80
C $35.00 $37.80
D $40.00 $42.80

F. n = r - 2.80 H. n = r × 0.1
G. n = r + 2.80 I. n = r ÷ 0.1


  1. SHORT RESPONSE Nancy wanted to
    make a model of her room. She measured
    the room and it was 12 feet by 10 feet. She
    decided to make a model that was ^1
    16
    as
    long and
    ^1
    16
    as wide as her room. Find the
    area of the model room. Explain your
    answer.

  2. Nyomi recorded the Time Worked
    in One Week
    Day Time (h)
    Monday 1
    Wednesday 1.25
    Friday 1.5
    Saturday 3


amount of time she
worked each day
last week. If she
worked 0.75 of her
permitted weekly
hours, how many
hours is she
permitted to work?
A. 5 h C. 9 h
B. 6 h D. 12 h


  1. What is the volume of the cone in cubic
    feet? Round to the nearest tenth. Use 3.14
    for π.
    F. 21.2 ft^3


36 in.

108 in.
G. 75.8 ft^3
H. 84.8 ft^3
I. 254.5 ft^3


  1. EXTENDED RESPONSE A movie theater
    sells popcorn in boxes like the one
    shown below. The manager wants to sell a
    new size that is larger by a scale factor of 1.5.


8 in.

4 in. 4 in.

Part A What is the volume of the original
popcorn box?
Part B What is the volume of a similar
popcorn box that is larger by a scale factor
of 1.5?
Part C The surface area of the popcorn
box is 144 square inches. What would
be the surface area of the similar popcorn
box that is larger by a scale factor of 1.5?

667_669_C11_STP_895130.indd 669 12/30/09 4:45 PM

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