Most banks just give you a warning if you write a check which you cannot cover in your checking account. true or false?

That would be false. They can return the check to you unpaid, or pay for it and charge you a fee.

So, first let's convert 3 minutes into seconds. We get that 3 min = 180 seconds.

Now, it says that the treasure sinks 20 feet per second and we want to know if it will reach -4,200 feet before 180 seconds. So, one way we can solve that it multiply 180 times 20.

We get 3,600 which means that in 3 minutes, the treasure will be -3,600 feet deep. The treasure will NOT reach the ocean floor in less than 3 minutes.

Hope this helps!