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nasryn
Group Title
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?
 2 years ago
 2 years ago
nasryn Group Title
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?
 2 years ago
 2 years ago

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goformit100 Group TitleBest ResponseYou've already chosen the best response.0
use speed time formula...
 2 years ago

nasryn Group TitleBest ResponseYou've already chosen the best response.1
I've never heard of that.
 2 years ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.1
related rates right?
 2 years ago

nasryn Group TitleBest ResponseYou've already chosen the best response.1
Yeah, related rates.
 2 years ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.1
\(A=\pi r^2\) and so \(A'=2\pi rr'\)
 2 years ago

satellite73 Group TitleBest 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
 2 years ago

nasryn Group TitleBest ResponseYou've already chosen the best response.1
wow, that was easy. I'm terrible at these.
 2 years ago

goformit100 Group TitleBest ResponseYou've already chosen the best response.0
@bloodrain
 2 years ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.1
yeah, i have to admit that one was real easy they get harder
 2 years ago

satellite73 Group TitleBest 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
 2 years ago

nasryn Group TitleBest 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
 2 years ago

nasryn Group TitleBest ResponseYou've already chosen the best response.1
That made absolutely no sense to me.
 2 years ago

Dido525 Group TitleBest 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.
 2 years ago
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