When she graduated from college, Andrea deposited $2,000 in a savings account that earned 9% simple interest. What was the balance of her accounts after 6 months?

$2090

Step-by-step explanation:

The time is 6/12 since it is in months and not years

Interest =

              =

              = $90

This means her balance will be $(2000+ 90) = $2090

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents