
Set

, so that

. Then the integral is

Or, if you meant exponents in place of coefficients,

Let

, so that

, and use the fact that

to get

Same amount of time every hour is constant rate.
25 min / 5 hrs = 5 min per hour
8 hrs × 5 min per hr = 40 min rest
Answer:
6k(5f+3)
Step-by-step explanation:
18k+30fk
Factor out 6.
6(3k+5fk)
Consider 3k+5fk. Factor out k.
k(3+5f)
Rewrite the complete factored expression.
6k(5f+3)