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anonymous
 5 years ago
Circlular metal plate for a machine has radius r. Larger plate with radius r+2 is to be usedin another part of the machine. Write an expression in simplest form for the sum of the areas of the two circles.
my answers is: r^2+2r
it that right?
anonymous
 5 years ago
Circlular metal plate for a machine has radius r. Larger plate with radius r+2 is to be usedin another part of the machine. Write an expression in simplest form for the sum of the areas of the two circles. my answers is: r^2+2r it that right?

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amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0\[\pi r^2 + \pi(r+2)^2 \rightarrow \pi(r^2 +r^2 +4r +4)\]\[\rightarrow \pi(2r^2 +4r +4) = 2\pi(r^2 +2r +2)\]

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0you had a part of it ;)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so the anwser should be 2(r^2+2r+2)

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0real close there.... you left out the "pi": 2 pi(r^2 +2r +2)
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