At the opening session of the united states supreme court, each justice shakes hands with all the others. there are nine justices that sit on the supreme court. how many handshakes do they make during the opening session?
a.
32 handshakes
b.
36 handshakes
c.
45 handshakes
d.
81 handshakes

Three coins are flipped. what is the probability that there will be at least two tails?

Aline on the wall and a line on the floor are skew. always, sometimes, or never?

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?