99 x 99 x 99 / 9 - 99 /99 explain ; )

Which statement most accurately describe why the division property of exponents does not apply to the expression (-8)^2/(-3)^4

Need on this one asap im almost done with this subject

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?