Is the solution of 1/3 x equal 21 greater than or less than 21

Rewrite the hyperbolic equation 4y^2 -9x^2 +54x-8y-113=0

How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits

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.