Suppose a rock is thrown off of a bridge into the river 120 feet below. the height, h, in feet of the rock above the river is given by h = ? 16t2 + 84t + 120, where t is the time in seconds. how long does it take the rock to splash into the river below?

The table above shows approximate conversions from gallons to liters. what is the value of x?

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?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base