Answer:
A≈12.57
Step-by-step explanation:
Using the formulas
A=πr2
d=2r
Solving for A
A=1
4πd2=1
4·π·42≈12.56637
Answer:
a= 365
b= 700
c=76.5
Step-by-step explanation:
the first one goes by 10, and the arrow is in the middle of 60&70, so it is 365
the second one goes by hundreds, so it is 700
the third one goes by .5, and the third one is 76.5
The rate at which the sand is leaking, is the same rate at which the volume of the cone is increasing, so the rate of the sand leak is then the same as dv/dt of the cone.
now, we know the height is always the same length as the radius, thus h = r.