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10. Multi-Step In 3 minutes, a damselfly's wings beat 2,700 timesand a butterfly's wings beat 2,100 times. About how many moretimes did the damselfly's wings beat in one minute than did thebutterfly's wings?

Sagot :

Damselfly

3minutes the wing beat is 2700times

The wing beat/time ratio is:

[tex]\frac{2700}{3}=900[/tex]

It beats its wings 900times/min

Butterfly

3minutes the wing beat is 2100times

The wing beat/time ratio is

[tex]\frac{2100}{3}=700[/tex]

It beats its wings 700times per minute.

Calculate the difference between both rates:

[tex]\text{Damselfly-Butt}\operatorname{erf}ly=900-700=200[/tex]

The Damselfly beats its wings 200times/minute more than the Butterfly

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