The curved part of this figure is a semicircle. What is the best approximation for the area of this figure?

A. 21 + 14.5π units^2
B. 10.5 + 14.5 units^2
C. 21 + 7.25π units^2
D. 10.5 + 7.25π units^2

1. 8 or -82. 14 or -143. -11, -3, 0, 7, 10

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.