-Why does the money in a savings account grow?

It earns interest, plus it earns interest on the interest.
A bank manager invests the money in the stock market.
The federal government matches your deposit.
You don’t pay taxes on it.

The correct answer is letter "A": It earns interest, plus it earns interest on the interest.

Explanation:

In banking, the money individuals save in their accounts is used by the financial institutions in different investment instruments being the most basic lending those sources to other individuals or institutions. Account-holders, though, benefit from the interest rate set at the moment of selecting their bank accounts. If a compounded interest rate was chosen, the account holder will get interest over the interest that the bank computes periodically.

in terms of experimental research, mcdonald’s charging different prices in the two cities relates to

the answer is a. $209,000