At Michael's school, 38% of the students have a pet dog and 24% of the students have a pet cat Michael found that 11% of the students had both a pet dog and a pet cat. What is the probability that a randomly chosen student at michaels school will have a pet dog or a pet cat

Math each whole number with a rational, exponential expression

If the value of cos330°is√3/2 then find cos 165°.

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