What is the circumference of the circle in terms of pi radius is 20 in.20 pi in40 pi in60 pi in400 pi in

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.

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

Ahiker stands at an unknown elevation before he ascends 2 miles up a mountain to an elevation of 9 miles. find the elevation of the hiker before his ascent.