How many solutions are there to the equation x1  x2  x3  x4  x5  21 where xi, i = 1, 2, 3, 4, 5, is a nonnegative integer such that a) xi  2 for i = 1, 2, 3, 4, 5? b) 0 3; 1 4,  x1   x2  and x3  15 ?

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0

6 meters

step-by-step explanation:

you divide them and then you get the answer i took this class this year

step-by-step explanation:

answer: the sun

explanation:

water cycle describes the evaporation of water from earth's surface, formation of clouds and precipitation water back onto the surface of earth. seventy percent of the earth is covered with water in the form of seas and oceans. the heat of the sun causes the evaporation of water from the surface of the ocean. the water vapors rise and condense to form water droplets. the collection of these water droplets form clouds which rain down again.

the evaporation of the oceans surface water as part of the water cycle is caused by the sun