Pam open a bank account with $200 deposit that account had a simple interest rate of 4.6% her most recent bank statement shows a balance of $328.80 if she made no deposits or withdrawals how long ago was the account opened ?

Step-by-step explanation:

we know that

The simple interest formula is equal to

where

A is the Final Investment Value

P is the Principal amount of money to be invested

r is the rate of interest  

t is Number of Time Periods

in this problem we have

substitute in the formula above  and solve for t

Sarah multiplied the denominator by the denominator and the numerator by the numerator instead of finding the cross products. The equation should be 5x = 42, so the cost should be $8.40.