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Mathematics 24 Online
OpenStudy (anonymous):

find the value of x

OpenStudy (anonymous):

OpenStudy (anonymous):

its the same as the other one silly, just with different numbers!

OpenStudy (anonymous):

so x is 3?

OpenStudy (anonymous):

no, not the same answer, same method.

OpenStudy (anonymous):

1/3 (pi r^2)(13)=215 solve for r

OpenStudy (anonymous):

\[215=\pi \times x ^{2}\times 13\]

OpenStudy (anonymous):

yes, but after simplifing actually sub in the value of pi as a number and solve it down to a real number

OpenStudy (anonymous):

3.14*13=40.82/3=13.61

OpenStudy (anonymous):

where did you put the x squared?

OpenStudy (anonymous):

13.61(x^2)=215

OpenStudy (anonymous):

good, keep going

OpenStudy (anonymous):

15.8

OpenStudy (anonymous):

15.8=x^2, yup, almost there

OpenStudy (anonymous):

7.9

OpenStudy (anonymous):

how did you get that?!

OpenStudy (anonymous):

15.8/2

OpenStudy (anonymous):

ops.. 3.97

OpenStudy (anonymous):

no thats x to the 2nd, opposite of to the 2nd is square root aka ^.5 and yes very good i get 3.97 as well

OpenStudy (anonymous):

(for the other one i rounded to 3, it was some decimal really close to 3 i think)

OpenStudy (anonymous):

okay.. thank you

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