Help
please?
on a timer so need it ASAP

How do i do this activity, is appreciated

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

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)?