The man is going to exit the stairwell at the 4th floor, which is at a height of 42 feet above ground level. Let t be equal to the number of second it takes for him to get to the 4th floor. Set up and solve an equation to find the value of t. Round your answer to the nearest tenth of a second.

Which speed is the fastest (use 1 mile ≈ 1.6 kilometers)? a. 12 miles/hour b. 18 feet/second c. 19 kilometers/hour d. cannot be determined

You drop a rubber ball off the roof of a 50 meter high building onto a paved parking lot. it bounces back up with every bounce, but not quite all the way back up to you. after the first bounce it bounces back only 80 percent of the distance it was dropped from. the pattern continues, meaning after every bounce it comes up to just 80 percent of the previous maximum height. so if before the first bounce the height is 50 meters, what height does the ball reach after the fifth bounce? round your answer to one decimal place and chose the correct response from the choices below:

One integer is 8 times another. if the product is 72, then find the integers