Answer: C
Step-by-step explanation:
triangle: [(4 1/2) x 5] / 2
11.25
semicircle: (5/2)^2 x 3.14
(2.5^2 x 3.14) / 2
(6.25 x 3.14) / 2
19.625 / 2
9.8125
add them together:
9.8125 + 11.25 = 21.0625
rounded: 21.1
