Question

multiply and write the answer without expondents (2x10^5) x (2x10^6)

Answer 1

first, multiply out those tens.
10^5 is 10x10x10x10x10=100000
10^6 is 10x10x10x10x10x10=1000000

Answer 2

then you'll want to finish inside the parenthesis with the 2s to get
200000x2000000

Answer 3

then do that final multiplication to get
400,000,000,000

Answer 4

thank you, my next problem is Simplify (8a)^-2

Answer 5

are you familiar with the rule that says a negative exponent means you can switch it to a denominator and a=make it positive? (or visa versa)

Answer 6

with that, we can get 1/(8a)^2 a much prettier problem. just square out that 8a and you're done!