On a 20-item practice test, how many questions must you answer correctly for a score of 80% correct?

Any greatly appreciated! you in advance. jody bought 20 shares of amazon at the close price of $121.00. she bought 20 more shares a year later at the price of $127.00. two years later she's sold all of her shares at the price of $133.00. her broker charges $50 for each transaction. after all of these transactions how much money did jody make? a.$65.00b.$5288.00c.$210.00d.$310.00

An ulcer medication has 300 milligrams in 2 tablets. how many milligrams are in 3 tablets?

If a || b and e || f , what if the value of y ?