SOLUTION: can someone help me please???? In testing a certain machined part, it is found that the number of failures, F, increases with hours of use, h, according to the equation F=8.69*l

Question 768188: can someone help me please????
In testing a certain machined part, it is found that the number of failures, F, increases with hours of use, h, according to the equation F=8.69*ln[h] + 20. Find the number of hours of use which leads to 75 failures.
Hours of use (nearest integer):
Answer by josgarithmetic(39623) (Show Source): You can put this solution on YOUR website!

Want h when F is known.

Now assign 75 to F. Compute h.

In case the code tagging and highlighting interfere, that formula is
h=e^((F-20)/8.69)
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