How large a sample would be required in order to estimate the fraction of Americans over 33 who smoke at the 90% confidence level with an error of at most 0.02? Round your answer up to the next integer.

What is the distance between (–2 1/2,-3) and (1, –3)?

Closing a credit card usually _your debt ratio. a. increasesb. decreasesc. improvesd. has no effect on

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?