Answer:
72 is the answer
21-4 IS 17, AND 17 - 9 IS 8, THEN 9X8 IS 72.
28+28+28= 84
28 x 28 x 28 = 21952
hope it helps!:)
8.34 is the answer
Hope this help
153.86
Step-by-step explanation:
formula - A = π × r2
3.14 x 7^2
= 153.86