Desperate ->and explain! : )
"the average translational kinetic energy of a gas molecule of mass m is given by (mv^2)/2 = 1.5at, where v is the molecule's average speed, a is the boltzmann constant, and t is the absolute temperature (k). assume that there is one hydrogen atom per cm^3 in outer space, where the temperature is 3.5k. determine the particle's average speed."

Haley buys 9 pounds of apples for $3. how many pounds of apples can she buy for $1?

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.

What is the volume of this container?