Answer:
628 cm^2
Step-by-step explanation:
The formula of an area of a circle is (π)(r^2). But this is a semicircle, so you must divide by 2.
(π(20^2))/2 = 628.318....
I Think Its C
14.14
V=4
3πr3=4
3·π·1.53≈14.13717
The variable <em>x </em>is equal to 0.5
The answer is 9.9
