What is the square root of 0.64

0.8

Step-by-step explanation:

First, let's solve it without the decimal. So it would be this:

. That one is pretty easy. Think about it. 8^2 = 64 so the sqare root of 64 is 8.

Now, for the decimal. It's 0.64. That's into the hundreths of 2 decimal spots. To find the square root are answer will be 8, moved one slot over.

So our answer is:

$20.01

step-by-step explanation:

the sale price is (1.00 - 0.77)($87), or 0.23($87), or $20.01.