Can someone plz help me Consider the parabola with a focus at the point (0, - 3) and directrix y = 2 . Which two equations can be used to correctly relate the distances from the focus and the directrix to any point (x, y) on the parabola?

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?