Given the probabilities p(a) = 0.3 and p(b) = 0.2, what is the probability of the union

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?

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