At a large distance r from a radio antenna, the intensity of the radio signal I is related to the P
power of the signal P by the formula I = P/ 4r^2Which of the following expresses the square
of the distance from the radio antenna in terms of the intensity of the radio signal and the
power of the signal?
47182

step-by-step explanation:

arc length = 6.63311 ft.

step-by-step explanation:

the formula the arc measure is:

arc length s=2πr(c)/360

where:

c   is the central angle of the arc in degrees

r   is the radius of the arc

π   is pi, approximately 3.142

using the above formula we get

s =

thus we find that arc length of an arc for a circle of radius 20 feet and central angle 19 degrees is

6.63311 feet