Plane HKP and plane RKP are two distinct planes. Name the intersection of plane HKP and plane RKP.

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?

Ftara spends $219 a month for her car payment and she makes $3,200 a month, what percent of her monthly income is spent on her car payment?

Why is x= 4 a solution to the proportion 14/x 56/1 6