When n = 2, which of the expressions below will be greater than 30? Select all that apply. A)7n2–(3n+4)
B)5(3+n3)
C)n4⋅2
D)(7n−2n)×4

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?

Pls brainliest will be awarded if answer is correct

Aline passes through the point (–7, 5) and has a slope of 1/2 which is another point that the line passes through?