Asavings account has a 3% interest rate. (a) complete the ratio table shown. show your work. deposit ($) 100 50 300 interest ($) 12 (b) how much more interest would you have if you deposited $200 than if you deposited $150? show your work.

The amount of interest of the money invested in a savings account is calculated through the equation,
                                   I = Prn
where I is the interest, P is the principal, r is the decimal equivalent of the given rate, and n  is the number of years. In this item, we assume that n is equal to 1. 
Solving for the interests,
                $200:     I = ($200)(0.03)(1) = $6
                $150:     I = ($150)(0.03)(1) = $4.5
The difference between the two calculated interests is $1.5. 

Therefore, you could have earned $1.5 more if you invested $200 rather than $150. 

The answer to that is 6