Answer :
Answer:
2464cm^2
Step-by-step explanation:
Formula for area of a circle = A = pi*r^2
r^2 comes first and we plug in 28.
28^2 = 784
Then we multiply it by pi, which in this case is 22/7
784 * 22/7 = 2464
Answer:
estimate:2571.4
actual:2464
Step-by-step explanation:
1) Area of a circle formula:
pi*r^2
pi=22/7
radius=28 cm
so
22/7*28^2=
22/7*784/1=17248/7
17248/7= 24694
THIS IS THE EXACT VALUE
EStimate is
20/7*30^2=
20/7*900=18000/7
2571.4
2464 AND 2571.4 ARE CLOSE ENOUGH SO I WOULD USE 20/7*30^2 AS MY ESTIMATE HOPE THIS HELPS!