At a video store, for every DVD bought at the regular price, a customer can buy a second DVD for half the regular price. Nadia buys two DVDs, each of which regularly
costs d dollars, and pays $33 in all. What is the regular price of each DVD?

Candice uses the function f(t)=t+100−−−−−−√ to model the number of students in her after-school program. the variable t represents days and f(t) represents the number of students. how many days does it take for there to be 15 students in her program? a. 225 days b. 125 days c. 325 days d. 115 days