Identify the apothem (a), the radius (r), and the perimeter (p) of the regular figure.
A. a = OB r= OP. p = (8)AB
B. a = OP, r= 0A, p = AB
C a = OP, r= OB, P = PB
= OP, r= OA, p = (8)AB

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.

Is the power produced directly proportional to the wind speed, give reasons for your answer?