A motor is 85.4 % efficient: that is, the output is 85.4 % of the input. What is the input if the motor delivers 10.75 hp. ( Round your answer to 1 decimal place.)

12.6 hp

Step-by-step explanation:

Represent the input by n.                              10.75 hp

Then 0.85n = 10.75 hp, and n (the input) is = 12.6 hp

                                                                           0.85

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step-by-step explanation:

the answer is  

a.

4,624π mm2

step-by-step explanation: