Answer:
The net change is - $0.30
Step-by-step explanation:
3.5 - 3.7 = -.2
-.2 + 3.3 = 3.1
3.1 - 3.4 = -.3
1/2 area of circle (16pi)/2 . plus (length of the botton 15 by pythag. times 8 divided by 2 )===== .
8pi plus 127.5
A+b=13
a-b=7
add the two equations using system of equations
2a=20
a=10
10+b=13
b=3