Simplify using only positive exponents: 1. (2x^3y^7)^-2 2. 12x^5y^3 4x^-1 3. (r^-7 b^-8) (t^-4 w)

So here are a few rules with exponents that you should know:

Firstly, solve the outside exponent:

Next, convert the negative exponents into positive ones:

Your final answer is

For this, just divide:

Your final answer is

For this, convert all negative exponents into positive ones:

Your final answer is

168

step-by-step explanation:

first off, we know that he drove 3.5 hours at a rate of 48 mph.

knowing that, we want to see how many miles he drove all-together.

in this case, we can just multiply 48 by 3.5.

48 * 3.5 = 168