A sinusoidal electromagnetic wave emitted by a cellular phone has a wavelength of 49.2 cm and an electric-field amplitu

[answerhappygod]

A sinusoidal electromagnetic wave emitted by a cellular phone
has a wavelength of 49.2 cm and an electric-field amplitude
of 7.7 x 10-2 V/m at a distance of 457 m from the
phone. Calculate
a) the frequency of the wave;
b) the magnetic field amplitude;
c) the intensity of the wave
p = 3.1416
(answer should be in 2 decimal places)