Answer:
Step-by-step explanation:
we are given
Calculation of A(4):
we can plug x=4
Since, this curve is below x-axis
so, the value of integral must be negative
and it is quarter of circle
so, we can find area of quarter circle
radius =4
Calculation of A(8):
we can plug x=8
we can break into two parts
now, we can find area and then combine them
Calculation of A(12):
we can plug x=12
we can break into two parts
now, we can find area and then combine them
Calculation of A(14):
we can plug x=14
we can break into two parts
now, we can find area and then combine them