A company sells widgets. The company's fixed and variable costs are modeled by the function C(r) =0.28x +34000. Its revenue is modeled by the function R(x) 9.9r. How many widgets does the company have to sell to break even? Round your answer up to the nearest whole number, if needed.

Maria solved an equation as shown below. what is the solution to maria’s equation?

Margie is practicing for an upcoming tennis tournament. her first serve is good 20 out of 30 times on average. margie wants to know the estimated probability that her first serve will be good at least four of the next six times she serves. how could she design a simulation for this scenario?

The angle of elevation from point a to the top of a cliff is 38 degrees . if point a is 80 feet from the base of the cliff , how high is the cliff ?