Zalmon walks 1/2 of a mile in 2/10 of an hour. What is his speed in miles per hour?

Question 5 spring semester final exam math evaluate

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

Which geometric principle is used to justify the construction below?