Answer:
subtract 1 then divide 2
Step-by-step explanation:
I solved and the mean is 10
116
8.2 / 2 = 4.1
a =
0.5 x 8.2 x 5.6736 = 23.2618
23.2618 x 5 = 116.309 = 116
A=prt
A=2000×7%×4
=560