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Mathematics 15 Online
OpenStudy (anonymous):

The area of a circle Q is 16 pi. If lines segment FC is a diameter of circle Q and F Corresponds to point (4,7) on the standard(x,y) coordinate plane, which one of the following coordinates could be point C?

OpenStudy (aripotta):

ok, so we know that 16 is r^2. if we find the square root of 16, that'll give us the radius, and if we double that, we get the diameter

OpenStudy (aripotta):

then we can use the distance formula to find out where the other point would be

OpenStudy (anonymous):

k

OpenStudy (aripotta):

OpenStudy (anonymous):

so

OpenStudy (anonymous):

could (0,7) be a point?

OpenStudy (anonymous):

or

OpenStudy (anonymous):

ahh

OpenStudy (anonymous):

you said the diameter was 8, right?

OpenStudy (anonymous):

so (4,-1) could be a point since it is eight spaces away from (4,7), right?

OpenStudy (anonymous):

you there?

OpenStudy (aripotta):

yea, i'm trying to work it out lol

OpenStudy (aripotta):

ugh i have no idea.

OpenStudy (anonymous):

well

OpenStudy (anonymous):

the diameter is 8, right?

OpenStudy (aripotta):

yea

OpenStudy (anonymous):

(4,7) corresponds to the diamter FC

OpenStudy (anonymous):

so(4,7) go move eight spaces down to (4,-1), right?

OpenStudy (aripotta):

i guess that could work

OpenStudy (aripotta):

we have no idea if FC is going up and down or left to right or any which way

OpenStudy (anonymous):

Read the question again

OpenStudy (anonymous):

read the last 10 words

OpenStudy (aripotta):

oh, so what's our choices?

OpenStudy (anonymous):

what could be point C?

OpenStudy (anonymous):

(0,7),(4,-1),(4,3),(8,7),(12,15)?

OpenStudy (anonymous):

our original point is (4,7)

OpenStudy (anonymous):

think about the diameter 8

OpenStudy (aripotta):

(4,-1)

OpenStudy (anonymous):

yep

OpenStudy (aripotta):

that could work

OpenStudy (aripotta):

see, you don't need my help lol. you figured that out yourself

OpenStudy (anonymous):

yeah

OpenStudy (anonymous):

but I like your help

OpenStudy (anonymous):

next problem

OpenStudy (aripotta):

i can't do any more until after 8

OpenStudy (aripotta):

i scheduled a DBA for between 6 and 8 and i have no idea when she's gonna call

OpenStudy (anonymous):

Florida Virtual?

OpenStudy (aripotta):

she's calling now -_-

OpenStudy (aripotta):

yea, flvs. and she said i wasn't ready for it. that i have to study -_- how annoying

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