Please I don’t know this question

What is the solution to the equation 9^(x+1) =27

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)?

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?