7th Grade Math

(Marvins-Underground-K-12) #1
EP30 Extra Practice

Extra Practice


Multi-Part Lesson 10-2 (continued)
PARTS E F PAGES 594–599

Find the total surface area of each pyramid. Round to the nearest tenth if necessary.


  1. 9 m


7 m
7 m

2.

2 cm

2 cm 2 cm

4 cm

1.7 cm

3.

8 in.

2 in.^13 2 in.^13


  1. GIFT BOXES Mr. Parker is making gift boxes in the shape of square
    pyramids for party favors. They have a slant height of 2.5 inches and
    base edges of 2 inches. How many square inches of card stock does he
    use to make one gift box?

  2. BIRDHOUSES Bonita is building a birdhouse. The birdhouse is a regular
    octagonal pyramid. The base has side lengths of 4 inches and an area of
    about 77 square inches. The slant height is 8 inches. If the entire birdhouse
    is made from plywood, how much plywood will Bonita need?


Multi-Part Lesson 10-3: Composite Figures
PART A PAGES 602–603

Use the solve a simpler problem strategy to solve each problem.


  1. EARNINGS Cedric makes $51,876 each year. If he is paid once every
    two weeks and actually takes home about 67% of his wages after
    taxes, how much does he take home each paycheck? Round to the
    nearest cent if necessary.

  2. CARS Jonah plans to decorate the rims on his tires by putting a strip
    of shiny metal around the outside edge of each rim. The diameter of
    each tire is 17 inches, and each rim is 2.75 inches from the outside
    edge of each tire. If he plans to cut the four individual pieces for each
    tire from the same strip of metal, how long of a strip should he buy?
    Round to the nearest tenth.


BIOLOGY About five quarts of blood are pumped through the average human
heart in one minute.


  1. At this rate, how many quarts of blood are pumped through the
    average human heart in one year? (Use 365 days = 1 year.)

  2. If the average heart beats 72 times per minute, how many quarts of
    blood are pumped with each beat? Round to the nearest tenth.

  3. About how many total gallons of blood are pumped through the
    average human heart in one week?


EP2_EP36_ExtPract_M1_895130.indd EP30 1/6/10 11:46 AM

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