Jack went to a local restaurant and ordered the following: Soda - $2.75
Hamburger - $5.75
French Fries - $2.00
Chocolate Chip Cookie - $0.75
a) What was his subtotal?

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan

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?

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36