It takes an old printer 8 hours to print all the pictures for the yearbook. a modern printer can do the same job in 5 hours. How long it takes to do the job with both printers working on it.

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?

Write an equation in point-slope form for the line through the given point that has the given slope (-2,-7); m=-3/2

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.