Consider the parabola with a focus at the point (0,7) and directrix y= 1. 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?

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?

Pyramid shown has a square base that is 18 inches on each side has a surface area of 164 square inches what is the slant height