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Mathematics 7 Online
OpenStudy (anonymous):

Help me please

OpenStudy (anonymous):

OpenStudy (jack1):

=Area of square - Area of circle + 28 x 28 - pi x 14^2

OpenStudy (luigi0210):

First what you do is find the area of the circle and subtract from the area of the square

OpenStudy (anonymous):

So what would be my answer or the steps I need to take to get my answer

OpenStudy (anonymous):

Here you would figure out the area of the square. Then you would figure out the area of the circle. Then you would subtract the area of the circle from the area of the square

OpenStudy (anonymous):

So I multiply 28 by 28 first?

OpenStudy (luigi0210):

Yes

OpenStudy (anonymous):

I got 784

OpenStudy (anonymous):

Now what?

OpenStudy (luigi0210):

Find the area of the circle, it's like Jack1 said

OpenStudy (anonymous):

How would I do that?

OpenStudy (anonymous):

Where do I go from 784

OpenStudy (luigi0210):

\[\Pi r^2\]

OpenStudy (anonymous):

14 x 2?

OpenStudy (anonymous):

No, It's 14 SQUARED, not 14*2

OpenStudy (anonymous):

I got 196

OpenStudy (luigi0210):

time pi

OpenStudy (anonymous):

3.14?

OpenStudy (luigi0210):

Well do yo want an estimate or an exact answer?

OpenStudy (anonymous):

I have to round the final answer to the nearest hundredth

OpenStudy (anonymous):

as needed

OpenStudy (luigi0210):

Then use 3.14

OpenStudy (luigi0210):

so it's \[28^2-(14^2*3.14)\]

OpenStudy (anonymous):

i got 615.44

OpenStudy (anonymous):

Am I right?

OpenStudy (luigi0210):

Yes, now just subtract it from 28^2 and you're done

OpenStudy (luigi0210):

The answer should be 168.56

OpenStudy (anonymous):

When you round that to the nearest hundredth? what would it be? 169

OpenStudy (luigi0210):

Nearest hundredth or hundred?

OpenStudy (anonymous):

hundredth

OpenStudy (luigi0210):

the it would be 168.56

OpenStudy (anonymous):

Thank You.

OpenStudy (luigi0210):

Anytime

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