Three smaller surface area = 6*3=18, while bigger = 14, so three smaller will melt faster.
27, 54, 81, 108, 135, 162, 189, 216, 243, 270, 297, 324, 351, 378, 405, 432, 459, 486, 513, and 540.....
You can try by plugging each ordered pair and seeing if the equation comes out true.
(5, 1)
2 * 5 - 1 = 9
That's correct so C is the correct answer.
Your answer is 3 raised to 4 that is 3^4.
Hope this helps :)