Lisa made a scale drawing of a poster she is going to paint. She used a scale of 1 cm = 5ft. If the picture in Lisa’s drawing is 3 cm wide, how long is the actual poster?

What am i doing here. add?

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?