c. Now assume a transmit power of 250 W at the earth station. What is the power received at the satellite antenna in dBW and in W?
Note that
Pr =Pt/(4 π d2)
where Pr = received power, Pt = transmitted power and d is distance from transmitter in meters.
Pr = 250 / (4 x 3.14 x d2) W
Note that you have not provided the distance between the earth and the satellite
Pr = 19.9 / d2 W
Power in dbW is given by -

Put the value of Pr in place of P(W) to obtain P(dbW)
I have tried to explain it in very simple language and I hope that i have answered your question satisfactorily.Leave doubts in comment section if any.
c. Now assume a transmit power of 250 W at the earth station. What is the...
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