Compatible numbers are easy to divide mentally.
hope this helped
The answer too your question is 65 it is equal to the square root of 65
The radius is half of the diameter.
To find the circumference, use the equation C=2(pi)r or C=(pi)d.
r meaning radius. d meaning diameter.
(pi) is about 3.14 or 22/7
The reciprocal of -13/7 should be -7/13
