Which expression is equivalent to (a^-8b)
(a^-5b^3)
Assume a≠0,b≠0.

Step-by-step explanation:

I think it is C

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.