George has to mow a rectangular area that is 25 feet by 50 feet. His parents bought a lot next to him that has an area that is 50 feet by 100 feet to mow. How many times more area does he have to mow now than
before assuming that he does not need to mow the first lot anymore?

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?

Askate shop rents roller skates as shown on the table below. which graph and function models this situation?

Which of the functions graphed below has a removable discontinuity?