I just applied for trusted helper. Wish me luck!

Aladder that is 30 ft long needs to reach 27 ft up a building. what should the angle of the vertical be?

The highest common factor of 132 and 220

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.