A rocket rises straight up from a point X on the ground. A tracking device is on the ground 30 feet from point X. The distance between the tracking device to the rocket is changing at a rate of 100 ft/sec. At what rate is the height of the rocket changing when the rocket is 40 feet high?

The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?