What expression is equivalent to ^15 sqrt 5.5^6

Franco wants to double the volume of the cone. what should he do?

What is this inequality notation? t is less then or equal to 2

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)?