Find the circumference of the circle. round your answer to the nearest centimeter.
a) 8 cm
b) 16 cm
c) 79 cm
d) 157 cm

Fiona and her friends are playing a game by guessing where a coin will land when it is randomly dropped inside the square shown below. fiona guesses that the coin is likely to land in the blue area. which explains whether or not fiona is correct and why?

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

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.