A method for the detection of morphine is used to generate a calibration curve in which the assay response (y) is plotted versus morphine concentration (x, in mg/L). This gives a straight line with a slope (m) of 0.241 and a y-intercept (b) of 0.011, where y = mx + b. The slope of this line has a standard deviation of ±0.007, and the standard deviation of the intercept is ±0.006.

y = 0.241(±0.007)x + 0.011(±0.006)

If the sample from an athlete gives a response of 0.506 ± 0.013 in this method, what are the concentration of morphine in the sample and estimated precision of this concentration?

 

Light-It-Up Company maintains and repairs warning lights, such as those found on radio towers and lighthouses. Light-It-Up Company prepared the following end-of-period spreadsheet at August 31, 20Y5, the end of the fiscal year: Account Title Cash Accounts Receivable Prepaid Insurance Supplies Land Building Accumulated Depreciation-Building Dr. Unadjusted Trial Balance Adjustments Adjusted Trial Balance 10,800 38,900 4,200 2,730 98,000 Light-It-Up Company End-of-Period Spreadsheet 400,000 For the Year Ended August 31, 20Y5 Cr. 205,300 Dr. Cr. 5,000 3,150 2,180 12,000 Dr. 10,800 43,900 1,050 550 98,000 400,000 Cr. 217,300 Instructions Equipment Accumulated Depreciation-Equipment Accounts Payable Salaries and Wages Payable Unearned Rent Common Stock Retained Earnings Dividends Fees Earned Rent Revenue Salaries and Wages Expense Advertising Expense Utilities Expense Depreciation Expense-Building Repairs Expense 101,000 10,000 219,400 30,700 16,400 8,850 85,100 15,700 2,100 75,000 137,100 425,000 900 4,100 12,000 4,800 4,100 5,000 900 101,000 10,000 223,500 30,700 16,400 12,000 8,850 89,900 15,700 4,100 1,200 75,000 137,100 430,000 900 Repairs Expense Depreciation Expense-Equipment Insurance Expense Supplies Expense Miscellaneous Expense 8,850 4,320 945,300 945,300 4,800 3,150 2,180 32,130 32,130 8,850 4,800 3,150 2,180 4,320 971,200 971,200 Required: 1. Prepare an income statement for the year ended August 31, 20Y5. 2. Prepare a statement of stockholders' equity for the year ended August 31, 20Y5. During the year, common stock of $25,000 was issued. 3. Prepare a balance sheet as of August 31, 20Y5. 4. Based upon the end-of-period spreadsheet, journalize the closing entries. 5. Prepare a post-closing trial balance. Statement of Stockholders' Equity 1 2 beginning balance 3 additional common stock issued 4 Net income 5 Dividends 6 ending balance Light-It-Up Company Statement of Stockholders' Equity For the Year Ended August 31, 20Y5 Common Stock Retained Earnings Shaded cells have feedback. Points: Score: 17/80 Total 3.83 / 18 Balance Sheet 1 2 Current assets: 3 4 5 6 7 9 Cash 8 Property, Plant and Equipment: Land Accounts receivable Prepaid insurance Supplies Total current assets 11 10 Building Accumulated depreciation-buildina Assets Light-It-Up Company Balance Sheet August 31, 20Y5 Shaded cells have feedback. Score: 51/198 Balance Sheet 12 Accumulated depreciation-equipment 13 14 15 16 17 18 19 (Label) 20 21 22 23 24 25 26 27 28 Liabilities Stockholders' Equity Shaded cells have feedback. General Journal D 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 DATE Aug. 31 DESCRIPTION Closing Entries Salaries and Wages Expense Advertising Expense Utilities Expense Insurance Expense Miscellaneous Expense Retained Earnings Depreciation Expense-Equipment Depreciation Expense-Building POST. REF. DEBIT CREDIT ASSETS LIABILITIES EQUITY Shaded cells have feedback. Post-Closing Trial Balance 1 Cash 2 Accounts Receivable 3 Prepaid Insurance 4 Supplies 5 Land ACCOUNT TITLE 6 Building 7 Accumulated Depreciation-Building 8 Equipment 9 Accumulated Depreciation-Equipment 10 Accounts Payable 11 Salaries and Wages Payable 12 Unearned Rent 13 Common Stock 14 Retained Earnings 15 Totals DEBIT Shaded cells have feedback. CREDIT