Hi guys,

The following equation was derived from a theoretical test, where t is equal to time:

ε = 4x10^−5t^4−0.0024t^3+0.0487t^2−0.3428t+1.4532

I was told I need to differentiate to dε/dt

I have got the following as my answer:

(4t^3−180t^2+2435t−8570) / 25000

Does that look correct?

I was then asked what the answer would be if the time was 15 hours, which I would then put in to the above equation - if it is correct?

Thanks for any pointer.

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