The revenue function r(x) and the cost function c(x) for a particular product are given. these functions are valid only for the specified range of values. find the number of units that must be produced to break even.

Asap 25 pts + brainliest to right/best answer

Which of the following are parts of a sphere

Liz is shipping a package to her friend.the maximum weight of a medium flat-rate box is 20 pounds,including the box which weighs 6 ounces.write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.