The diameter of the hemisphere is 60 feet. What is the surface area of the curved viewing area of the planetarium? (Use 3.14 for π. Round the answer to the nearest tenth, if necessary. Recall that the formula for the surface area of the curved part of a hemisphere is SA = 2πr2.)

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

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !

What is the total surface area of this square pyramid?