Respuesta :
The circle expands it radius 20m each day. From this description you can get this equation:
r=0+ 20*d
r=20d
The oil slick expands as a circle and the formula for circle area is [tex] \pi [/tex] r^2. If you insert the first equation into this equation you will got:
circle area = [tex] \pi [/tex] r^2
circle area = [tex] \pi [/tex] (20d)^2
circle area = [tex] \pi [/tex] 400*d^2
r=0+ 20*d
r=20d
The oil slick expands as a circle and the formula for circle area is [tex] \pi [/tex] r^2. If you insert the first equation into this equation you will got:
circle area = [tex] \pi [/tex] r^2
circle area = [tex] \pi [/tex] (20d)^2
circle area = [tex] \pi [/tex] 400*d^2
Answer:
Step-by-step explanation:
d = number of days since the oil slick started
r = radius in d days = 22d
A(d) = area of oil slick in d days = π(22d)2
A(d) = 484πd2
