An energy-efficient lightbulb, taking in 23.0 w of power, can produce the same level of brightness as a conventional lightbulb operating at power 100 w. the lifetime of the energy-efficient bulb is 10 000 h and its purchase price is $5.00, whereas the conventional bulb has lifetime 750 h and costs $0.60 per bulb. determine the total savings obtained by using one energy-efficient bulb over its lifetime as opposed to using conventional bulbs over the same time period. assume an energy cost of $0.20 per kilowatt-hour.

Suppose a stock had an initial price of $65 per share, paid a dividend of $1.45 per share during the year, and had an ending share price of $58. a, compute the percentage total return. (a negative answer should be indicated by a minus sign. do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) b. what was the dividend yield and the capital gains yield? (a negative answer should be indicated by a minus sign. do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.)

You decide to invest in a portfolio consisting of 25 percent stock a, 25 percent stock b, and the remainder in stock c. based on the following information, what is the expected return of your portfolio? state of economy probability of state return if state occurs of economy stock a stock b stock c recession .16 - 16.4 % - 2.7 % - 21.6 % normal .55 12.6 % 7.3 % 15.9 % boom .29 26.2 % 14.6 % 30.5 %

Upon completion of the northwest-corner rule, which source-destination cell is guaranteed to be occupied? a. top-leftb. the cell with the lowest shipping costc. bottom-leftd. top-righte. bottom-right