The spoke of a wheel reaches from the center of the wheel to its rim. if the circumference of the rim of the wheel is 42 inches, how long is each spoke? round your answer to the nearest hundredth.

The formula for the circumference of a circle of radius r is C = 2pi*r.

Here we know that the circumference is 42 inches, and we need to find the radius, r.  Solving this equation for r, we get:

      42 inches

r = = 6.68 inches, to the nearest hundredth.

        2(3.14)

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have