In order to provide drinking water as part of its 50-year plan, a west coast city is considering constructing a pipeline for importing water from a nearby community that has a plentiful supply of brackish ground water. a full-sized pipeline can be constructed at a cost of $122 million now. alternatively, a smaller pipeline can be constructed now for $80 million and enlarged 20 years from now for another $100 million. the pumping cost will be $25,000 per year higher for the smaller pipeline during the first 20 years but will be approximately the same thereafter. both pipelines are expected to have the same useful life with no salvage value. ( a ) at an interest rate of 6% per year, which alternatively is more economical? ( b ) write the spreadsheet function to display the pw for the smaller pipeline alternative.

Select the correct answer the smith family adopted a child. the adoption procedure took about three months, and the family incurred various expenses. will the smiths receive and financial benefit for the taxable year? a) they will not receive any financial benefit for adopting the child b) their income tax component will decrease c) they will receive childcare grants d) they will receive a tax credit for the cost borne for adopting the child e) they will receive several tax deductions

At cooly cola, we are testing the appeal of our new diet one cola. in a taste test of 250 randomly chosen cola drinkers, 200 consumers preferred diet one cola to the leading brand. assuming that the sample were large enough, the large-sample 95% confidence interval for the population proportion of cola drinkers that prefer diet one cola would be:

Areal estate agent is considering changing her cell phone plan. there are three plans to choose from, all of which involve a monthly service charge of $20. plan a has a cost of $.42 a minute for daytime calls and $.17 a minute for evening calls. plan b has a charge of $.52 a minute for daytime calls and $.15 a minute for evening calls. plan c has a flat rate of $80 with 275 minutes of calls allowed per month and a charge of $.38 per minute beyond that, day or evening.a. determine the total charge under each plan for this case: 150 minutes of day calls and 70 minutes of evening calls in a month. (do not round intermediate calculations. round your answer to 2 decimal places. omit the "$" sign in your response.)c. if the agent will use the service for daytime calls, over what range of call minutes will each plan be optimal? (round each answer to the nearest whole number.include the indifference point itself in each answer.)d. suppose that the agent expects both daytime and evening calls. at what point (i.e., percentage of total call minutes used for daytime calls) would she be indifferent between plans a and b?