Can someone tell me the right answer to this question pls and you

Find the value of 1715⋅211.though these numbers aren't quite as nice as the ones from the example or the previous part, the procedure is the same, so this is really no more difficult. give the numerator followed by the denominator, separated by a comma.

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

What is the similarity ratio of a cube with volume 729m^3 to a cube with volume 3375 m^3