The Speedy-Delivery Company has two options for its delivery truck. The first option is to purchase a new truck for $14,000. The new truck will have a useful life of 6 years and a residual value of $2000. Operating costs for the new truck will be $200. The second option is to overhaul its existing truck. The cost of the overhaul will be $8000. The overhauled truck will have a useful life of 6 years and a residual value of $0. Operating costs for the overhauled truck will be $800. Using Speedy's discount rate of 4%, which option is better and by what amount

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.