815.755 round to the nearest hundred is 816
40 x 0.08875 = 3.55
40 + 3.55 = 43.55
the sum is $43.55
You can use the measure of 112 on the similar shape to find b, as they are same side exterior angles. From there, you can find both a and c, because a/b and b/c are supplementary angles.
a = 68 degrees
c = 68 degrees
