Answer:
1386
Step-by-step explanation:
To find the area of the circle shown, we should use the formula , where:
=
r = Radius = 21 in.
Now, we should evaluate the area since we have all values.
× × =
=> 66 x 21
=> 1386
It would take 30 years
Answer: 9: c , 10: a ,11 :d 12: a
discrete i think i might be wrong