What is the base of 4×4×4×4×4?

4

Step-by-step explanation:

When you have a something raise up to a number this can be represented as:

Where is the base and the exponent. In this case you have five times four, then you can re-write the expression as:

Where the is equal to 4 and equal to 5

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.