According to the author, what is the main obstacle to exploring the ocean depths? Explain why, citing evidence
from the text.

Rob filled 5 fewer plastic boxes with football cards than basketball cards. he filled 11 boxes with basketball cards.

Need solving this 2nd limit problem.

Problem 3 a bank charges a service fee of $7.50 per month for a checking account. a bank account has $85.00. if no money is deposited or withdrawn except the service charge, how many months until the account balance is negative