One of the ideas that you have explored in previous courses is how to describe a set of data. one of the ways that you may have seen before is finding an average (also called a mean). read the math notes box for this lesson to review what a mean is and how to find it. then find the mean for each set of data below.

7.25

step-by-step explanation:

we know that 7 equals to 7.0. we also know that 1/4=0.25. so we can add the two together and we get 7.25

1st part is 64,000,000

2nd part 500,000

step-by-step explanation:

there is only one way to arrange all the eight relative to each other because they are not distinct. we have

now there are nine places to place an (and not more than one in one place).   because we have four symbols, we need to choose four of these nine places to insert an . order does not matter because the are not distinct.

thus there are 1 · c(9,4) ways, or, if we calculate it,

thus there are 126 ways to form such "words."