Someone 100 points to answer 2 questions! spell everything out because i have more questions like this and i have no idea how to do them a. it is not 5^3 b. i have no idea

I gotcha!

First answer is A.

Second answer is also A.

See screenshots below if your interested in how it's solved :)

A.

easy, remember rules of exponents

the only one you need to know for this question is this one: \frac{x^m}{x^n}=x^{m-n}

also x^{-m}=\frac{1}{x^m}

so in this case

\frac{5^5}{5^8}=5^{5-8}=5^{-3}=\frac{1}{5^3}

answer is 1st option

B.

same as A

answer is 1st option

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.

you are uyytr tyy

step-by-step explanation: