Jacob is standing on his balcony and drops his car keys 18 feet to his friend in the parking lot below. His friend does not catch the keys; how long does it take the keys to hit the ground? Use the formula shown: h=-16t²+s

The probability that a student graduating from suburban state university has student loans to pay off after graduation is .60. if two students are randomly selected from this university, what is the probability that neither of them has student loans to pay off after graduation?

The function f(x) = 14,600(1.1)* represents the population of a town x years after it was established. what was the original population of the town?

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