Find the area of the shaded region below. (assume a = 3 cm and b = 8 cm. assume that given measurements are exact, and round approximate answers to the nearest tenth of a square unit.)

(just #9)

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?

The train station clock runs too fast and gains 5 minutes every 10 days. how many minutes and seconds will it have gained at the end of 9 days?

Select the graph of the solution. click until the correct graph appears. |x| = 3