A paper airplane was thrown for the top of a tall building. The height of the paper airplane above the ground cane found using function y=-1.5x+60, where x is the time in seconds the airplane has been in the air. How many seconds did it take the paper airplane to reach the ground

Me with this one question, and i'll upvote the brainliest answer

A50% increase followed by 33 1/2% decrease

Ahypothesis is: a the average squared deviations about the mean of a distribution of values b) an empirically testable statement that is an unproven supposition developed in order to explain phenomena a statement that asserts the status quo; that is, any change from what has been c) thought to be true is due to random sampling order da statement that is the opposite of the null hypothesis e) the error made by rejecting the null hypothesis when it is true