This is how you do it hope this helps.
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:
the perimeter is of 148 m
Step-by-step explanation:
the perimeter is the sum of all sides so an square has all sides equal so we have
and the area is
so we find x
and now the perimeter
The answer is 4 because 14-9=5 and 20/5=4
Answer:
The value of PC is 40.
Step-by-step explanation:
Consider the complete question is " C is the circumcenter of triangle PQR. PC=3X-7 RC=5X-15 & QC= 51-X What does PC equal?"
All vertices or a triangle are equidistant from its circumcenter.
The value of x is 11.
We need to find the value of PC.
Substitute x=11 in the above equation.
Therefore, the value of PC is 40.