Aplane flew a total of 2,220 miles. its avarage speed was 555 miles per hour. how many hours did the plane fly ?

At which value in the domain does f(x) =0?

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)?

What is the value of x in the equation 2(x-4) = 4(2x + 1)?