Original price of a microphone is $179.99 discount is 56% what is the answer

Find the average rate of change for f(x) = x2 − 3x − 10 from x = −5 to x = 10.

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels