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#1
Oct 6 2013 07:18pm
The area of a circle is directly Proportional to the square of its radius. If the area of a circle with a radius of 13 feet is 530.66ft^2 then what is the area of a circle with a radius of 19 feet?(Round to the nearest hundredth)


FG for correct answer
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#2
Oct 6 2013 07:21pm
pi*(r^2)
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#3
Oct 6 2013 07:33pm
Quote (saber_x3 @ Oct 7 2013 01:21am)
pi*(r^2)


Yeah im looking for a answer, and thats not the right equation.. Im leaning towards 775.58 but i believe its wrong
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#4
Oct 6 2013 07:36pm
Quote (SyML1nK @ Oct 6 2013 09:18pm)
The area of a circle is directly Proportional to the square of its radius. If the area of a circle with a radius of 13 feet is 530.66ft^2 then what is the area of a circle with a radius of 19 feet?(Round to the nearest hundredth)


FG for correct answer


1134.11
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#5
Oct 6 2013 07:37pm
1134.11ft
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#6
Oct 6 2013 07:38pm
Or, for your example: 1133.54 using the truncated 3.14 value for pi. ;)
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#7
Oct 6 2013 07:41pm
Quote (CorinaMarie @ Oct 6 2013 08:38pm)
Or, for your example: 1133.54 using the truncated 3.14 value for pi. ;)


it would still be 1134.11 :p
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#8
Oct 6 2013 07:45pm
Quote (PincheChino123 @ Oct 6 2013 09:41pm)
it would still be 1134.11 :p


Work out the one for the first example. I get 530.93 using 3.1415927, so I back figured from their answer of 530.66 / 169 to see they used 3.14.

I think my answer is what the OP is looking for. ;)
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#9
Oct 6 2013 07:46pm
Yeah it was! THanks, I have another one that I need done too lol
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#10
Oct 6 2013 07:48pm
Quote (SyML1nK @ Oct 6 2013 09:46pm)
Yeah it was! THanks, I have another one that I need done too lol


Alright. What is it?
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