Question

The surface area of a cell phone screen is 4900 mm². Use the fact that 10 mm = 1 cm to convert this area to cm². Round your answer to the nearest whole number. Do not type the units in the space below.

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Answer 1

49 cm²

Explanation:

10 mm = 1 cm

1 mm = 1/10 cm

4900 mm² = 4900 × mm × mm

4900 mm² = 4900 × 1/10 cm × 1/10 cm = 49 cm²