(3s^13)(9s^-5) is simply a matter of multiplication.
First, multiply the coefficients, or the numbers in front of the s. In this case, 3s x 9s = 27s.
When multiplying exponents, you simply add them, so the next step is 13-5 or 8. Therefore your answer is 27s^8
He is wrong. A transformation is a reduction when the scale factor is between -1 and 1. If the scale factor is greater than 1, then it's a dilation.
In this case, the scale factor is a fraction, but fractions can represent numbers outsise the [-1,1] interval.
In this case, in fact, 8/3 is an improper fraction, meaning exactly that it represents a number greater than 1.
So, this transformation is a dilation, becase the scale factor 8/3 is greater than 1.
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