Find the missing length indicated of CD

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.

What is the square root of 45? (step by step working plz)

If square root x = -7, then x= -49 true or false