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So I solved A (PROFESSOR APPROVED MY ANSWER) and I am unsure for b,c,and d...

to get A i have to solve for q

first since it was not given.

Q=Er^2/k = 3.12uC...

TO SOLVE for flux i did 4pi*k*Q = 353429.17 Nm2/C

Please please help me with b,c,and dScreen Shot 2019-08-01 at 10.40.47 PM.png

Screen Shot 2019-08-01 at 10.40.47 PM.png

7. If at a point in space located 15cm away from a point charge you are measuring an electric field of 1.25 -106N / C , and if there is no other source of electric field present, (a)
what is the electric flux through the surface of a sphere centered at the location of the charge and with the radius of 15cm? (b) What is the magnitude of this charge? (c) How
will your answer to part (a) change, if the radius of the surface is doubled? (d) What if
you change the surface to a cube centered on the charge?

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