1. A sectional drawing is a a. cutaway view of a building or object
b. drawing of an object as if viewed from above
c. drawing of an object as if viewed directly from the front
d. drawing of an object as if viewed from one side

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?

Which is f(5) for the function –2x2 + 2x - 3?

The graph of a hyperbola is shown. what are the coordinates of a vertex of the hyperbola? (0, −4) (−3, 0) (0, 0) (0, 5)