In the diagram below, light from the Sun strikes a beach
(Z). The beach sand gains heat then warms the air that is
immediately above it (X) and the sand that is immediately
below it (Y). The warm air rises and is replaced by cool air
Which point indicates convective heat transfer?
A. W
B. X
C. Z
D. Y
The answer is A. W

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).

What is the range? can’t seem to find it out

Acompany produces packets of soap powder labeled “giant size 32 ounces.” the actual weight of soap powder in such a box has a normal distribution with a mean of 33 oz and a standard deviation of 0.7 oz. to avoid having dissatisfied customers, the company says a box of soap is considered underweight if it weighs less than 32 oz. to avoid losing money, it labels the top 5% (the heaviest 5%) overweight. how heavy does a box have to be for it to be labeled overweight?