Two certificates of deposit pay interest that differ by 3%. money invested for one year in the first cd earns $240 interest. the same principal invested in the other cd earns $360. find the two rates of interest. smaller value and larger value (%)

a = interest rate of first CD

b = interest rate of second CD

and again, let's say the principal invested in each is $X.

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