one would say that the simple interest doubles if the period of time is specified in the contract and the contract is still valid, if the interest amount is available anitime and so on.
So if the amount doubles let's say at half time for which the principal was awarded to the bank, by the end of the contract , the interest amount can be double × just increased by 1.5
310 / 75-5 = 4.42 or 4.4 hours. Let me know if you have any other questions.
Yes they would be able to . well depends if that is a $10 overall they would be able to it would be a total of $96.85 not including the tax .