Matt reasoned that he can write 9/1000 as 0.9. is he correct?

No.  The answer is 0.009
The easiest way to check your work is for you to place a 1 for the decimal and to move to the right by adding zeros until you hit the number for the denominator.

This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?

50.2450.24 in squared