A balloon is tied to the ground with a 90 ft rope. A breeze blows on the balloon, causing it to hover at an unknown angle 80 ft above the ground. What is the angle
between the rope and the ground? Round to the nearest degree.

What is the missing constant term in the perfect square that starts with x^2 -20x

Average acceleration: i have no idea how to do this.

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 =