He rowed 10 miles in total. YOU'RE WELCOME :D
Answer: 
Step-by-step explanation:

Distribute the negative sign. This basically changes all the signs inside the parentheses.

Combine like terms;

Hi Kyliebreland!
So, If he saved $5 then we do $20 divided by $5 which gives 4 so now we split 100% into 4 pieces which gives us 25%.
Hope this helps!
Answer:
It equals 256 because 2x2x2x2x2x2x2x2= 256