Question

Question #0a2a6

Answer 1

I found: `8xx10^-12`

Explanation:

You can write it as:
`8xx10^-5xx10^-7=` using the rule of exponents:
`x^a*x^b=x^(a+b)` you get:
`=8xx(10^-5xx10^-7)=8xx10^(-5-7)=8xx10^-12`