Carla withdrew $320 every month for four years to help pay for college. How much total money did she withdrawal?

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

What are the digits that repeat in the smallest sequence of repeating digits in the decimal equivalent of 24/11?

Which expression is equivalent to -12(3x-3/4)