Consider a competitive industry with several firms all of which have the same cost function, c(y) = y2 + 4 for y > 0 and c(0) = 0. the demand curve for this industry is d(p) = 50 ? p, where p is the price. what is the long-run equilibrium number of firms in this industry? show all work.

Symantec corp., located in cupertino, california, is one of the world's largest producers of security and systems management software. the company's consolidated balance sheets for the 2009 and 2008 fiscal years included the following ($ in thousands): current assets: receivables, less allowances of $21,766 in 2009 and $24,089 in 2008 $ 838,010 $ 758,700 a disclosure note accompanying the financial statements reported the following ($ in thousands): year ended 2009 2008 (in thousands) trade accounts receivable, net: receivables $ 859,776 $ 782,789 less: allowance for doubtful accounts (8,938) (8,990) less: reserve for product returns (12,828) (15,099) trade accounts receivable, net: $ 838,010 $ 758,700 assume that the company reported bad debt expense in 2009 of $2,000 and had products returned for credit totaling $3,230 (sales price). net sales for 2009 were $6,174,800 (all numbers in thousands).required: what is the amount of accounts receivable due from customers at the end of 2009 and 2008? what amount of accounts receivable did symentec write off during 2009? what is the amount of symentec’s gross sales for the 2009 fiscal year? assuming that all sales are made on a credit basis, what is the amount of cash symentec collected from customers during the 2009 fiscal year?

University car wash built a deluxe car wash across the street from campus. the new machines cost $219,000 including installation. the company estimates that the equipment will have a residual value of $19,500. university car wash also estimates it will use the machine for six years or about 12,500 total hours. actual use per year was as follows: year hours used 1 3,100 2 1,100 3 1,200 4 2,800 5 2,600 6 1,200 prepare a depreciation schedule for six years using the following methods: 1. straight-line. 2. double-declining-balance. 3. activity-based.

Dr. sperry, a biologist, is using excel to track growth rates of different populations of bacteria. she has a very complex formula in one cell. it begins with “round”. dr. sperry would like to see exactly how excel’s calculation reached the final rounded value that she sees in the cell. what could dr. sperry do to best understand how the calculation was made? try different formulas on her own until she reaches the value shown in excel click on the evaluate formula button in the formulas tab and then click “step in” select the cell and then look at the formula in the formula field of the ribbon remove “round” from the formula in order to see the actual value before rounding