5. [0/1 Points] DETAILS PREVIOUS ANSWERS LARAPCALC10 6.3.025. MY NOTES ASK YOUR TEACHER PRAC Use the Simpson's Rule program in Appendix E with n = 4 to approximate the change in revenue from the marginal revenue function dR/dx. Assume that the number of units sold x increases from 14 to 16. (Round your answer to two decimal places.) dR dx - = 4V 8000 - x3 $ 16.46 X Need Help? Read It Watch It9. [-/1 Points] DETAILS LARAPCALC10 6.3.042. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Use the Simpson's Rule program in Appendix E with n = 8 to approximate the present value (in dollars) of the income c(t) over t, years at the given annual interest rate r. (Round your answer to two decimal places.) c(t) = 185,000 + 15,000Vt, r = 11%, t, = 8 $ Use the integration capabilities of a graphing utility to approximate the present value (in dollars). Compare the results. (Round your answer to two decimal places.) $ Need Help? Read It Submit Answer 10. [0.34/1 Points] DETAILS PREVIOUS ANSWERS LARAPCALC10 6.3.044. MY NOTES ASK YOUR TEACHER The table shows the residential prices of electricity (in cents per kilowatt-hour) for the years 2006 through 2014.+ Year 2006 2007 2008 2009 2010 Price 10.40 10.65 11.26 11.51 11.54 Year 2011 2012 2013 2014 Price 11.72 11.88 12.12 12.54 (a) Use Simpson's Rule to estimate the average residential price of electricity over the time period in cents per kilowatt-hour per year. (Round your answer to four decimal places.) cents per kilowatt-hour per year (b) A model for the data is E = 516.23254e- + 0.0182t - 0.595t2 + 6.58t - 12.9 for 6 s t S 14, where E is the residential price of electricity (in cents per kilowatt-hour) and t is the year, with t = 6 corresponding to 2006. Use integration to find the average residential price of electricity over the time period, in cents per kilowatt-hour per year. (Round your answer to four decimal places.) cents per kilowatt-hour per year