Answer:
$7
Step-by-step explanation:
1.) A = πr^2
Rate of change (dA/dr) = 2πr.
When r = 3, dA/dr = 2(3)π = 6π ft^2/ft
2.) V = πr^2h
Rate of change of volume given constant r is dV/dt = πr^2dh/dt = π(6)^2(3) = 108π cm^3/min
Answer:
240
Step-by-step explanation
18/30 = 9/15
9/15 = 3/5
3/5 = 0.6
0.6 x 400 = 240
Ergo it is likely 240 students would choose pizza
