a food truck sells tacos, burritos, and drinks.
let event a = a customer buys a taco.
let event b= a customer buys a drink.
what does p(a or b) = 0.55 mean in terms of this problem?

What is the y-intercept of the line given by the equation

Thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 127 millimeters, and a variance of 36. if a random sample of 35 steel bolts is selected, what is the probability that the sample mean would differ from the population mean by greater than 0.5 millimeters? round your answer to four decimal places.

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?