Write an equation of a circle with the given center and radius.
center (2,4) and radius 5

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

How do you find the area of a triangle

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.