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10 October, 14:02

A piece of cardboard is 12.0 cm long and 6.3 cm wide. What is the area of this piece of cardboard in square millimeters? Enter your answer to the correct number of significant figures.

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  1. 10 October, 15:41
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    Step-by-step explanation:

    The piece of cardboard is 12.0 cm long and 6.3 cm wide.

    1 centimeter = 10 millimeters

    Therefore,

    12 centimeters = 12 * 10 = 120 millimeters

    6.3 centimeters = 6.3 * 10 = 63 millimeters

    The cardboard is rectangular and the formula for determining the area of a rectangle is expressed as

    Area = length * width

    Therefore, the area of the cardboard is

    120 * 63 = 7560 millimeters²
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