The function h(x) = -2x² - 6x + 56 represents the approximate height of an object seconds after it is launched. How many seconds does it take the object to hit the ground?​

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

What is the value of the discrimination for the quadratic equation 0=×2+2+×2

Complete this sentence with the best of choices given