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Oil spilled from a ruptured tanker is spreading in a circular pattern. If the radius of the circle is
increasing at the constant rate of 1.5 feet per second, how fast is the area of the spill increasing when
the radius of the spill is 42 feet?
 one year ago
 one year ago
Oil spilled from a ruptured tanker is spreading in a circular pattern. If the radius of the circle is increasing at the constant rate of 1.5 feet per second, how fast is the area of the spill increasing when the radius of the spill is 42 feet?
 one year ago
 one year ago

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goformit100Best ResponseYou've already chosen the best response.0
use speed time formula...
 one year ago

nasrynBest ResponseYou've already chosen the best response.1
I've never heard of that.
 one year ago

satellite73Best ResponseYou've already chosen the best response.1
related rates right?
 one year ago

satellite73Best ResponseYou've already chosen the best response.1
\(A=\pi r^2\) and so \(A'=2\pi rr'\)
 one year ago

satellite73Best ResponseYou've already chosen the best response.1
you are told \(r'=1.5\) and \(r=42\) plug in the numbers and get \(A'\) in one step
 one year ago

nasrynBest ResponseYou've already chosen the best response.1
wow, that was easy. I'm terrible at these.
 one year ago

satellite73Best ResponseYou've already chosen the best response.1
yeah, i have to admit that one was real easy they get harder
 one year ago

satellite73Best ResponseYou've already chosen the best response.1
well only the formulas get harder to figure out, i am willing to bet that you knew the formula for the area of a circle
 one year ago

nasrynBest ResponseYou've already chosen the best response.1
yeah, I was just thinking like A=pi(r^t/1.5)^2 then I was super confused
 one year ago

nasrynBest ResponseYou've already chosen the best response.1
That made absolutely no sense to me.
 one year ago

Dido525Best ResponseYou've already chosen the best response.0
The minute hand on a watch is 8mm long and the hour hand is 4 mm long. How fast is the distance between the tips of the hands changing at one o'clock? THat's the hardest one I have done myself.
 one year ago
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