Dr /dt = 7
A = pi r^2
dA / dr = 2pir
dA/dt = dA/dr * dr/dt = 2pir * 7 = 14pir
when r = 12 rate of change of the area = 14*pi*12 = 168pi
= 527.79 cm^2 / minute to nearest hundredth
Finding what a number is diviseble by or finding multiples of a number
This is how you would solve the question.
Answer: 15 i think
Step-by-step explanation:
