The angle of elevation to a nearby tree from a point on the ground is measured to be 45^{\circ} ∘ . How tall is the tree if the point on the ground is 79 feet from the tree? Round your answer to the nearest hundredth of a foot if necessary.

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.