Four friends went scuba diving. according to the following statements, who spotted sea life at the fastest rate? lance saw 2 reef sharks in 6 minutes. jasmine saw 3 sea cucumbers in 8 minutes. robert saw 4 jellyfish in fifteen minutes. shilpa saw 3 pencil urchins in ten minutes.

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters

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.

Solve for the equation. 4x - 13 = 2x + 9