Scores on BMCC fall 2017 MAT150.5 department final exxam form a normal distribution with a mean of 70 and a standard deviation of 8. What percent of the population has the following? a. A score greater than 90
b. A score between 60 and 85
c. A score less than 60

Figure abcd is a parallelogram. if point c lies on the line x = 2, what is the y-value of point c?

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

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?