Answer:
A circle is 360° all the way around; therefore, if you divide an arc's degree measure by 360°, you find the fraction of the circle's circumference that the arc makes up. Then, if you multiply the length all the way around the circle (the circle's circumference) by that fraction, you get the length along the arc
Subtract 15 from 8 and you'll get if then you take 10- your answer which in this case is 7 and you get 10-7=3
hope this helpful and what you needed.
I think it’s true because its moving and and the energy is than converted into electric energy we use
6x - 15 = 90
6x = 90 + 15
6x = 105
x = 105/6
x = 17.5