Question

How many arrangements of 3 digits can be formed from the digits 0 through 9

Answer 1

does the order of the 3 digits matter or not?

Answer 2

im not sure

Answer 3

how many numbers can go in the first spot? how many in the 2nd spot? how many in the 3rd spot?

if repeats are okay then you have the same number of choices for each of the 3 spots.
if repeats are not okay then you should use permutations.

Answer 4

to get the answer, multiply.