New hospital employs 200 people on the nursing staff. sixty are nurse’s aides, seventy are practical nurses and seventy are registered nurses. nurse’s aides receive $ 15 an hour, practical nurses $ 25 an hour and registered nurses $ 30 an hour. what is the (weighted mean) hourly average wage of the nursing staff?

The total hourly payroll is ...

... 60×$15 + 70×($25 +30) = $4750

Then the weighted average hourly pay for a member of the nursing staff is ...

... $4750/200 = $23.75

11.2

step-by-step explanation:

when doing tangent the tangent of the angle is equal to the opposite side from the angle over the adjacent side to the angle.

tan43 = x / 12

move 12 over by multiplying each side by 12

12tan43 = x

x = about 11.2