You can model a certain arch bridge with the function y = -0.001086x2 + 0.977x, where x and y are in feet. How high above the river is the bridge? How long is the section of bridge above the arch?

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

Find the arc length of the semicircle. 7the grade

Which of the following is the maximum value of the equation y=-x^2+2x+5 a. 5 b. 6 c. 2. d. 1