A box contains 5 blue pens and 8 red pens. Two pens are drawn at random. One pen is drawn and not replaced. Then a second pen is drawn. What is the probability that the first pen is blue and the second one is red?

Will give are given that xy is parallel to zw. if xz is a transversal that intercepts xy and zw, angle angle alternate interior angles. since xy is parallel to zw, we know that these angles are we also know that angle xvy and angle zvw are , and thus congruent. we can conclude that △xyv ~ △zwv using the similarity theorem.

The circumference of a redwood tree trunk is 20π ft, and it is 100 ft tall. what is the approximate volume of the redwood tree trunk? 1,000π ft3 10,000π ft3 4,000π ft3 40,000π ft3

The radius of a sphere is 3 inches. which represents the volume of the sphere?