A shipment of twelve smartphones contains two with cracked screens. If sold
in a random order, what is the probability
that the first ten sold have undamaged
screens?

The polynomial function of least degree with a leading coefficient of 1 is: f(x) = x3 + ax2 + bx + c

Acredit card advertises an annual interest rate of 23%. what is the equivalent monthly interest rate?

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?