Question An economist estimated a linear relationship between the daily consumption of electricity for a region in megawatt-hours and the maximum daily temperature in degrees Celsius using daily data for December 2004 and January and February 2005 (n = 90). If the sums of squares of regression and the standard error of the estimate were found to be 918.13 and 3.17, respectively, determine the coefficient of determination. Answer as percentage correct to two decimal places.

An investor has a certain amount of money available to invest now. Three alternative investments are available. The estimated profit in Kwacha of each investment under each economic condition are indicated in the following payoff table:Event Investment Selection                                          A                B                CEconomy declines           500         -2000          -7000No charge                      1000          2000         -1000Economy Expand           2000          5000        20,000Based on his own past experience, the investor assigns the following probabilities to eacheconomic condition:                                   P (Economy declines) =  0.30                                              P (No change) = 0.50                                   P (Economy expands) = 0.20i. Determine the optimal action based on the maximax criterion.ii. Determine the optimal action based on the maximin criterion.iii. Compute the expected monetary value (EMV) for each investment.iv. Compute the expected opportunity loss (EOL) for each investment.v. Explain the meaning of the expected value of perfect information (EVPI) in this problem.vi. Based on the results of (iii) and (iv), which investment would you choose? Why?vii. Compute the coefficient of variation for each investment.viii. Compute the return-to-risk ratio (RTRR) for each investment.ix. Based on (vii) and (viii), what investment would you choose? Why?x. Compare the results of (vi) and (ix) and explain any differences

For the following exercises, find the surface area of the volume generated when the following curves revolve around the y-axis. If you cannot evaluate the integral exactly, use your calculator to approximate it. 199. y = x2 from x = 0 to x = 2

For the following exercises, find the lengths of the functions of y over the given interval. If you cannot evaluate the integral exactly, use technology to approximate it. 181. y = 5 - 3x from y = 0 to y = 4 – 4

C. Which of the following organisms are most closely related? Are any two the same species? On what did you base your answer? 2.0 A B D C Rod Rod Coccus Rod + + Fermentative Oxidative Fermentative Fermentative Characteristics Morphology Gram Reaction Glucose utilization Cytochrome oxidase GC moles % Present Present Absent Absent 48-52 23-40 50-54 49-53

For this week's discussion, you are asked to generate a continuous and differentiable function f (2) with the following properties: • f(x) is decreasing at x = -6 • f(x) has a local minimum at x = -3 • f (x) has a local maximum at x = 3 Hints: • Use calculus! • Before specifying a function f (2), first determine requirements for its derivative f' (2). For example, one of the requirements is that f' (-3) = 0. • If you want to find a function g(x) such that g(-9) = 0 and g(8) = 0, then you could try g(x) = (x + 9) (x – 8). • If you have a possible function for f' (2), then use the techniques in Indefinite Integrals this Module to try a possible f (x). You can generate a plot of your function by clicking the plotting option (the page option with a "P" next to your function input). You may want to do this before clicking "How Did I Do?". Notice that the label "f(2) =" is already provided for you. Once you are ready to check your function, click "How Did I Do?" below (unlimited attempts). Please note that the bounds on the x-axis go from -6 to 6. f(x) = How Did I Do? Try Another

CLEARLY PLEASE Toluene is produced by hydroforming conversion of n-heptane in a Cr203@-A1203 catalyst medium. The operating conditions of the process are given on the flow chart. The solvent used in the process is recovered. CH3CH2CH2CH2CH2CH2CH2 - CH3CH3 + 4H2 Toluene production efficiency is 15% based on n-heptane fed into the process. The solvent ratio used in the extractor is 10 kg solvent / 1 kg toluene. According to this, a. Calculate how much heat must be added or removed to keep the reactor isothermal at 425 °C. b. What is the temperature of the n-heptane or solvent stream leaving the extractor. (The temperatures of the n- heptane and solvent streams can be considered the same.) но | 425 °C Cooler n-Heptane Superheater 425 °C 18°C 18 °C Catalytic Reactor HO Saturated Toluene vapour n-Heptane . 38c Solvent Heat Heat Extractor Still Exchanger Separator 18 °C 120 °C Solvent Solvent+Toluene