The table below shows the air pressure in pounds per square inch at different altitudes in thousand feet: Altitude (thousand feet) 5 10 15 20 25 30 35 40 45
Air pressure (pounds per square inch) 12.4 10.2 7 6.2 5.2 4.2 3.4 2.6 2.0
Which scatter plot best represents the data in the table?

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable

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 =