a researcher wants to estimate the proportion of a population which possesses a given characteristic a random sample of size 250 is taken and 40% ,of the sample possess the characteristics. the 90% confidence interval to estimate the population proportion is​

Barbara deposited $300 in the bank. if the bank pays her simple interest at the rate of 4 percent per year, how much money will she have in her account at the end of 9 months?

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

Jack is considering a list of features and fees for current bank: jack plans on using network atms about 4 times per month. what would be jack’s total estimated annual fees for a checking account with direct paycheck deposit, one overdraft per year, and no 2nd copies of statements? a. $44 b. $104 c. $144 d. $176