Answer:
Let R be the greater radius and r be the smaller radius
A) Area of the sidewalk = R^2 - r^2 - This can be the expression
B) = 3.14
=(R^2-r^2)
=(11^2-9^2)
=(121-81)
=*40
That was the simplified expression
Answer = 3.14 * 40 = 125.6m^2
Step-by-step explanation:
Answer:
it's 9 I just took this assignment
Answer:
is wrong，6/20,3/10
Step-by-step explanation:
Answer:
147
Step-by-step explanation:
236-89=147
$4225 first year
$2746.25 second year
$1785.0625 third year
