please help!!

QUESTION 16 The current ratio formula is current assets divided by current liabilities. True False QUESTION 17 Internal controls protect cash. True False QUESTION 18 An endorsement is an authorized signature to transfer ownership of a check. True False QUESTION 19 An imaged check is a copy of a cancelled check. True False QUESTION 20 An ATM is an authorized teller machine. True False QUESTION 21 When an error is made while writing a check, the stub is also voided. True False