A concert promoter models the profit from her next concert, P dollars, by the equation: P=-11(t-55)^2+10571 a)How much should she charge per ticket to break-even? b)What price maximizes her profit? c)What is the maximum price she can charge before losing money? Show this step by step please?

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

2.2°  

step-by-step explanation:

let θ = the angle of elevation.

tanθ =77/2020

tanθ = 0.038 12

      θ = tan⁻¹0.038 12

      θ = 2.2°

4+4+2x

or

2x+8

step-by-step explanation: