7th Grade Math

39. FOOTBALL The table shows the NFL Quarterbacks

Player AttemptedPasses CompletedPercent

T. Brady 578 69

P. Manning 515 65

B. Roethlisberger 404 65

T. Romo 520 64

D. Garrard 325 64

number of passes attempted and

the percent completed by the top

quarterbacks in the NFL for a

recent season.

a. You can estimate the number

of passes that Tom Brady

completed by rounding 578 to

600 and 69% to 70%. Draw a

bar diagram to represent this situation.

b. Estimate the number of passes that Tom Brady completed.

c. Is your estimate greater or less than the actual number of passes he

completed? Explain.

d. Without calculating, determine whether Ben Roethlisberger or Peyton

Manning completed more passes. Justify your reasoning.

40. CLEANING A cleaning solution is made up of 0.9% chlorine bleach.
    a. About how many ounces of chlorine bleach are in 189 ounces of
    cleaning solution?
    b. About how many ounces of chlorine bleach would be found in 412
    ounces of cleaning solution?


41. FOOD DRIVE The students at Monroe Junior High sponsored a canned
    food drive. The seventh-grade class collected 129% of its canned food
    goal.
    a. About how many canned foods did the seventh-graders collect if their
    goal was 200 cans?
    b. About how many canned foods did the seventh-graders collect if their
    goal was 595 cans?


42. COASTLINE The coastline of the Atlantic Coast is 2,069 miles long.
    Approximately _^6
    10
    % of the coastline lies in New Hampshire. About how
    many miles of the coastline lie in New Hampshire? Explain how you
    estimated.


43. MP3 PLAYER The bar diagram shows the amount of money Marquis
    saved during a 4-month period to buy an MP3 player.

$60 in all

Jan. Feb. Mar. Apr.

The cost of the MP3 player is 130% of the amount shown in the bar

diagram.

a. Estimate the cost of the MP3 player.

b. Is your estimate greater or lesser than the actual cost of the MP3

player? Explain.

Lesson 1C Percents 329

Real-World Link

The NFL calculates a

quarterback’s pass

rating using a

formula based on

completions,

passing yards,

interceptions, and

passing touchdowns.

Terry Bradshaw had a

perfect passer rating

in 1976.

RR

T

318_330_C06_L1_895130.indd 329 12/30/09 4:03 PM