The object of a popular carnival game is to roll a ball up an incline into regions with different values. The probability that Reed will get 100 points in a roll is 30%, 200 points is 55%, and 300 points is 15%. The expected value, E(X), of a roll is:

Can someone answer this question for me

Will give brainliestbased on the topographic map of mt. st. helens, what is the contour interval if the volcano height is 2,950 m?

The trapezoid is composed of a rectangle and two triangles. what is the area of the rectangle? what is the total area of the triangles? what is the area of the trapezoid? a) 48 cm2; 32 cm2; 80 cm 2 b) 48 cm2; 16 cm2; 64 cm 2 c) 128 cm2; 32 cm2; 160 cm 2 d) 128 cm2; 16 cm2; 144 cm 2