I need help math please

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

Which of the following circles have their centers in the third quadrant? check all that apply.

Afunction, f(x), represents the height of a plant x months after being planted. students measure and record the height on a monthly basis. select the appropriate domain for this situation. a. the set of all positive real numbers b. the set of all integers oc. the set of all positive integers od. the set of all real numbers reset next