Identify the focus and directix of graph of the equation y = -2x^2 the vertex is located at the origin

Formulate alisha has a number in mind. if she adds three to her number the result is less than five. use this information to write and solve an inequality about alisha's number. then graph the solution set.

The mass of a marine organism, in pounds, p years after it is born is given by the polynomial function r(p) = -4p2 + 300p. find the mass when p = 20 years.

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25