(n-2)multiple 180 degrees the formula for finding the sum of all angles in a polygon regular here n represents the number of sides of the polygon.
We have to mutiply factor -2/3 times every agument from the parenthesis.

/+8b
8+6b=-4 /-8
6b=-12 /:6
b=-2 - its the answer
(B) but if there is another answers let me see cuz all i see is a and b
Uppose the fence was 350 ft from home plateAt what height was each ball when it
over the ?
4 hours? i may be wrong
i did - 60 * 15
seems about right, since 50% would be 7.5 hours?