
is the equation used for determining area from radius. We're given diameter, so to get the radius simply divide by 2. 19/2 = 9.5.

, when solved, equals

. After rounding to the nearest tenth, we get
First you need to add the prices to get 85.55. Then 100 - 85.55 is 14.45.
She will have $14.45 leftover
AAS.
The vertical angle.
The marked angle.
And the marked side.