What is the simplified expression for -0.0576(71.818x)^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)?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Can somebody 1. what is the formula for finding the vertical distance between two points on a coordinate plane?