A serial dilution is performed using the ATP stock from the previous question, as follows below. Determine the concentration, in μg/mL, of tube 3.             

You measure the absorbance of several samples of known concentration in order to generate a calibration curve. You plot the data with concentration (mg/ml) on the x-axis, and absorbance (AU) on the y-axis. The curve has an R2 value of 0.99 and an equation of y = 0.46x + 0.008. You measure the absorbance of a new sample, of unknown concentration. You get a result of 1.7 AU. Based on your calibration curve, what can you estimate the sample’s concentration to be, in mg/ml? Round your answer to 2 decimals. 

How many grams of caffeine would you need in order to prepare 50 mL of a 30 µM solution of caffeine? The Mw of caffeine is 456 g/mol.

You have a 64 mM stock that needs to be diluted to 1 mM. If you perform 1:2 dilutions serially, how many dilutions would it take until you reached 1 mM?

Below is some data for three years of recent activity for Firm X Summary of credit data related statistics Financial statemen figures in millions  $ 2024 2023 2022 Sales 245 225 210 Gross Receivables 52 50 46 Allowances for bad debt 5.2 6.0 4.8 Net Receivables 46.8 44 41.2 Unemployment rate end year 4% 6% 5.1% % of accounts 90 days past due 4.5% 6.6% 5.32% a) Given the rise in net receivables during 2024, this is likely channel stuffing which may have increased sales by over $2 million b) Assuming the firm’s past allowances for bad debt in 2022 and 2023 were accurate given the credit environment at the time, the firm is likely underestimating bad debt expense in 2024 by around $1.2 to $2.1 million c) Assuming the firm’s past allowances for bad debt in 2022 and 2023 were accurate given the credit environment at the time, the firm is likely underestimating bad debt expense in 2024 by around $0.2 to $1.19 million d) Both a) and b) e) Both a) and c) f) most likely none of the above given all the data presented 

The following will make Cash Flow from Operations increase and Net income Increase in the current year a) An increase in the value of a marketable Equity security during the year b) Cutting Cash Advertising at the last few days of the year c) A large impairment of land expense during the year d) A change of an assumption that lowers GAAP non-cash Depreciation and Amortization at the start of the current year e) all the above f)  b) and d) g) none of the above

Rocket Ship Inc recently adopted more aggressive revenue recognition assumptions.  They will recognize more revenue sooner on sales of bundled software products.  The firm’s sales are projected to grow steadily at 15% for the next 5 years.  The quicker revenue recognition standard will likely lead to higher reported GAAP profits and higher GAAP sales in 3 to 5 years relative to if the firm had kept the old slower revenue recognition assumptions.

See the data for Betamax Inc and question below.  Assume Betamax is a non-taxable firm Cash flow statement   2020 2019 2018 Net Income 115 118 107 Plus depreciation 100 99 98 Plus stock based compensation 30 29 27 plus restructuring expense liability 20 0 0 less change in receivables -4 -3 -2 Less change in inventory -6 -2 -2 Plus change in accounts payable 30 -10 21 Cash flow from operations 285 231 249 Capital expenditures -105 -110 -110 Cash from investing -105 -110 -110 Dividends -110 -110 -110 Cash from financing -110 -110 -110 Change in cash Position 70 11 29   Partial Balance Sheet (in millions $) Balance sheet 2020 2019 Cash 120 50 Net Receivables 54 50 Inventories 156 150 Current Assets 330 250 PP&E 750 745 Total Assets 1080 995 Accounts Payable 90 60 Restructuring liability 20 0 Current liabilities 110 60   sales and gross profit data in millions of $ 2020 2019 Sales 1310 1200 Gross Profit   307 280 What is the CFSA (Cash flow standardized accrual for this firm)?  Write in decimal form to 3 places (like -0.025)

True or false: A firm’s managers have greater motive to manipulate earnings upward in a soon to be released earnings report if insiders previously filed a 10-B5 stock sales program that has specified dates for sale of the insiders’ stock in the next few months   

Firm A has a pension.  The dollar return on its pension assets for 2024 was -$22 million for a negative 11% return on $200 million of pension assets at the start of the year.    At the start of 2024 the pension liabilities were $200 million.  Interest rates remained unchanged during the year.  In past years, the pension performed about as expected with respect to actuarial assumptions. a) Assuming no special changes to the pension plan, the firm will now have a net pension liability included in its liabilities at the end of 2024 b) The other comprehensive income (OCI) is likely going to be more negative in 2024 because of events relating to the pension plan c) All else equal, the impact of pension costs on GAAP net income will likely be more negative in 2025 than 2024. d) all the above e) a) and b) f) b) and c) g)  a) and c)