Is it greater than, less than or equal to? Please help and explain. Thank You

For which pair of functions is (gof)(a)=|a|-2?

Match each function with its rate of growth or decay

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)?