What is the perimeter of a square that has a side length of 7x - 2

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.

What is the surface area of the sphere?

What is the t intercept of the line given by the equation below y= -10x + 14