Ineed to pass this class , i don' t understand this can someone me ?
the focus of the parabola is (3,-7) and the directrix is y= -4
what is an equation of the parabola ?
options
a) (x -3)^2 = -3(y + 10)

b) (x -3)^2 = -1.5(y + 5.5)

c) (x -3)^2 = -12(y + 10)

d) (x -3)^2 = -6(y + 5.5)

Sara can take no more than 22 pounds of luggage on a trip.her suitcase weighs 112 ounces.how many more pounds can she pack without going over the limit?

Carmen ayer en el mercado compro 3/4 kg de guayabas, 6/8 kg de peras, 1/2 kg de naranjas ¿cuantos kilogramos de fruta compro?

An oil exploration company currently has two active projects, one in asia and the other in europe. let a be the event that the asian project is successful and b be the event that the european project is successful. suppose that a and b are independent events with p(a) = 0.2 and p(b) = 0.8. (a) if the asian project is not successful, what is the probability that the european project is also not successful? (b) what is the probability that at least one of the two projects will be successful? (c) given that at least one of the two projects is successful, what is the probability that only the asian project is successful? (round your answer to three decimal places.)