Ask your own question, for FREE!
Mathematics 91 Online
OpenStudy (anonymous):

Suppose oil spills from a ruptured tanker and spreads in a circular pattern. If the radius of the oil spill increases at a constant rate of 2 m/s. How fast is the area of the spill increasing when the radius is 19 m?

OpenStudy (bahrom7893):

This is a very simple problem: \[A=\pi r^2\] And you know that the change in radius dr/dt = 2 m/s

OpenStudy (bahrom7893):

Now you have to find out what dA/dt is, when r = 19m To find this, take the derivative of Area: dA/dt = 2*pi*r*(dr/dt)

OpenStudy (bahrom7893):

You need to know what is the change in area when r =19m and dr/dt = 2m/s so plug those values in: dA/dt = 2pi * 19m * 2m/s dA/dt = 76*pi (m^2/s) <=Your answer

OpenStudy (anonymous):

looks good , i concur

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Latest Questions
thatgirlcrazy: Match each attribute of the parabolic graph to its corresponding equation.
28 seconds ago 2 Replies 0 Medals
supie2: hows my drawing
39 seconds ago 31 Replies 5 Medals
supie2: i need help onb
1 hour ago 5 Replies 3 Medals
Sharkattack123: I drew something because I was bored heh
48 minutes ago 15 Replies 6 Medals
Azayliaa: i need helpp :/
52 minutes ago 14 Replies 2 Medals
desss: are any of yall good at mathh!!??
59 minutes ago 20 Replies 4 Medals
demonwolftwin: who was the 2rd presseddent
12 hours ago 1 Reply 0 Medals
Tbone: I made one last edit I'ma stop making them for a while
35 minutes ago 29 Replies 9 Medals
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!