Can you stay up all night? fu. ck me til the daylight

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

How much is $1200 worth at the end of1 year, if the interest rate is 5.5% is compounded quarterly.

Hello i need with my math homework i don't understand can someone explain how this works