Tabitha would like to invest $1,000 she received for graduation. She is considering these options. A: 8% for 2 years B: 6% for 18 months C: 7% for 3 years D: 10% for 6 months Which option should Tabitha choose to end up with the largest balance?

To be able to know which option Tabitha should choose to end up with the largest balance, she needs to know the interest of each option. The formula in computing the simple interest is: I = Prt Where P = principal mount             r = simple interest rate             t = time in years Choice A: I = $1,000 x 8% x 2 = $160 Choice B: I = $1,000 x 6% x 18/12 = $90 Choice C: I = $1,000 x 7% x 3 = $210 Choice D: I = $1,000 x 10% x 6/12 = $50 Therefore, the best option is Choice C and Tabitha should choose this one if she wanted to end up with the largest balance.