Spring break can be a very expensive holiday. A sample of 80 students is surveyed, and the average amount spent by students on travel and beverages is $593.84. The sample standard deviation is approximately $369.34. Is $521.58 ≤μ≤ $666.10 correct?

John makes $10.50 pers hour what expression represens how much he will make if he works h hours

Marcus needs to rewrite f(x) = x2 + 6x + 4 in vertex form.

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a seven or king. (b) compute the probability of randomly selecting a seven or king or jack. (c) compute the probability of randomly selecting a queen or spade.