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Mathematics, 30.03.2021 17:40 Daddysgirl2019

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Answers: 1
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Answer from: Quest

1) c 2143.6 cm

2) c 113.0 m

3) a 33.5 ft

4)   d 2 cm

5) c 20 mm

6) 180 in

7) d 120 ft

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Answer from: Quest

a negative exponent is translated as follows:

a^{-m} = \dfrac{1}{a^m}

so, we have

\left(5^{-1}+3^{-1}+2^{-1}\right)^{-1} = \left(\dfrac{1}{5}+\dfrac{1}{3}+\dfrac{1}{2}\right)^{-1} = \left(\dfrac{6+10+15}{30}\right)^{-1}=\left(\dfrac{31}{30}\right)^{-1}=\dfrac{30}{31}

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