John parks cars at a hotel. On average, 6.7 cars will arrive in an hour. Assume a driver's decision on whether to let John park the car does not depend upon any other person's decision. Define the random variable x to be the number of cars arriving in any hour period

The tax rate that determines the amount of tax that will be due on the next dollar of taxable income earned is called the:

a. average tax rate b. variable tax rate c. marginal tax rate d. fixed tax rate e. ordinary tax rate

Homer Nerdhoff has just invented a new cheese grater. He has been travelling around the country exploring marketing opportunities, and discovers that Martin Fitzhugh has for the past three years been selling the grater which he developed, using the

same process, at his fine food store in Halifax. Homer hopes that by patenting his grater, he can stop Martin from selling his. Martin sees the danger, and decides to also apply for a patent. Which of the following is true? A) Whoever registers his patent first will obtain the exclusive right to use it. B) Homer cannot obtain a patent because his invention was already known and used by Martin. C) Martin cannot obtain a patent because his invention has already been on sale for the past three years. D) Homer cannot obtain a patent; Martin can E) Both B and C