Each front tire on a particular type of vehicle is supposed to be filled to a pressure of 28 psi. Suppose the actual air pressure in each tire is a random variable—X for the right tire and Y for the left tire, with joint pdf
a.) What is the value of K?
b.) What is the probability that both tires are underfilled?
c.) What is the marginal distribution of air pressure in the right tire alone?
d.) What is the probability that the difference in air pressure between the two tires is at most 2 psi?

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?

According to the 2008 u. s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.