Aresearcher randomly assigns 50 students to two groups of 25. group 1 is given computers and educational software to take home and use, while group 2 is given educational workbooks to take home. two months later, the researcher gives each group standardized achievement tests. what is the research design?

Outstanding stock consists of 8,300 shares of cumulative 7% preferred stock with a $10 par value and 4,300 shares of common stock with a $1 par value. during the first three years of operation, the corporation declared and paid the following total cash dividends. year dividend declared 2016 $ 0 2017 $ 7,300 2018 $ 45,000 the amount of dividends paid to preferred and common shareholders in 2018 is:

Alarge tank is filled to capacity with 500 gallons of pure water. brine containing 2 pounds of salt per gallon is pumped into the tank at a rate of 5 gal/min. the well-mixed solution is pumped out at the same rate. find the number a(t) of pounds of salt in the tank at time t.

Spartan credit bank is offering 7.5 percent compounded daily on its savings accounts. you deposit $5,900 today. a. how much will you have in the account in 4 years? (use 365 days a year. do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) b. how much will you have in the account in 12 years? (use 365 days a year. do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) c. how much will you have in the account in 19 years?