The vertex of a parabola is (0,0) and the focus is (0,2) what is the equation of the parabola

Which equation represents the partial sum of the geometric series?

On saturday morning, calls arrive at ticketmaster at a rate of 108 calls per hour. what is the probability of fewer than three calls in a randomly chosen minute?

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?