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10 May, 14:41

The public library has an approximate length of 1 x 10^5 millimeters and width of 8 x 10^4 millimeters. what is the area, in square milliters, of the public library?

a. 8 x 10^9 square millimeters

b. 9 x 10^9 square millimeters

c. 8 x 10^20 square millimeters

d. 9 x 10^20 square millimeters

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Answers (1)
  1. 10 May, 14:45
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    Area = length*width

    ... = (1*10^5 mm) * (8*10^4 mm)

    ... = (1*8) * 10^ (5+4) mm^2

    ... = 8*10^9 mm^2

    Selection A is appropriate.
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