There are currently 499 students enrolled in Webster Elementary School, and the number of students is increasing at the rate of 15 students per year. Currently the annual expense to educate one student is $1,252, and the expense to educate one student is decreasing at the rate of $43 per year. Use the product rule to determine the rate at which the total expense to educate the students at Webster Elementary School is currently changing per year.

Which of the following housing decisions provides a person with both housing and an investment? a. selling a share in a cooperative. b. buying a single-family home. c. renting an apartment. d. subletting a condominium. 2b2t

If delta airlines were to significantly change its fare structure and flight schedule to enhance its competitive position in response to aggressive price cutting by southwest airlines, this would be an example ofanswers: explicit collusion.tacit collusion.competitive dynamics.a harvest strategy.

Acompany is developing a new high­performance wax for cross country ski racing. in order to justify the price marketingwants, the wax needs to be very fast. specifically, the mean time to finish their standard test course should be less thanseconds for a former olympic champion. to test it, the champion will ski the course 8 times. the champion's times(selected at random) are 59.9 61.9 48.8 52.2 46.6 45.3 50.6 and 41.1 seconds to complete the test course. complete parts a and b below.a) should they market the wax? assume the assumptions and conditions for appropriate hypothesis testing are metfor the sample.assume=0.05. what are the null and alternative hypotheses? choose the correct answer below.b) suppose they decide not to market the wax after the test, but it turns out that the wax really does lower the champion'saverage time to less thanseconds. what kind of error have they made? explain the impact to the company of such anerror.