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lesantik [10]
2 years ago
5

Tim used a lever to lift a heavy box off the ground. His input work was 50 J and the output work was 40 J. What was the mechanic

al efficiency of the lever?
A.90%
B.30%
C.80%
D.10%
Mathematics
1 answer:
solong [7]2 years ago
5 0
Answer:C

Explanation: 40 divided by 50 is .80
Equaling 80%

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The fraction of the total number of marbles is left in the bag after removing and giving part to her friend is 3/8

<h3>Fraction</h3>

let

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