Simplify. Explanation if you can.

10

Step-by-step explanation:

This expression uses the idea of exponential edition.  The basis is, when you have the same base number being multiplied, you can add the exponentials.  

Consider the case of 2 * 2.  We know this to be 4.  When writing 2 * 2, you can write this as 2^1 * 2^1 == 2^(1+1) == 2^2 == 4.  See how we added the powers to get the new exponential?

We will apply this same idea here.

10^(1/2) * 10^(1/2) == 10^(1/2 + 1/2) == 10^(1) == 10.

So, the simplified expression is 10.

Cheers.

2 over 5 and 4 over 15

don’t know last one sorry

step-by-step explanation: