Given the directrix of y = -1 and focus of (0, 3), which is the equation of the parabola?

Y=1/8x^2-1
Y=-1/8x^2+1
Y=1/8x^2+1
Y=-1/8x^2-1

Can you decompose the numbers 20,740,6,000

Write the expression in simplified radical form. show all steps and work including any foil method work. (hint: use the conjugate. no decimal answers.) (9-2√3)/(12+√3)

The tuition costs, c, for a local community college are modeled by c(h) = 250 + 200h, where h represents the number of credit hours taken. the local state university has tuition costs, s, modeled by the function s(h) = 300 + 180h. how many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.