The volume of a right circular cone of radius x and height y is given by v=13πx2y. Suppose that the volume of the cone is 85πcm3. Find dydx when x=4 and y=16.

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =

To solve the system of equations below, pedro isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 5y=10x {x^2+y^2=36

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m