He rowed 10 miles in total. YOU'RE WELCOME :D
Answer:

Step-by-step explanation:
The formula of a volume of a cone:

r - radius
H - height
We have r = 10cm and H = 16cm. Substitute:

Step-by-step explanation:
just multiple them and you'll get the results and the results you got add them together
Answer:
x^2 - 81
Step-by-step explanation:
There is a formula called the difference of squares, which is
(a+b)(a-b) = a^2 - b^2
57.8% is greater than 57.68%