Among 1815 randomly selected high school students surveyed by the Centers for Disease Control, 417 said they were current smokers.
Find the margin of error for a 95% confidence interval.

In trapezoid efgh, m∠gfe=63∘. identify m∠ghe. !

5(-9w) put expression in distributive property

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15