7/12 x 4= 28/12 and good luck again
After 2 minutes, temperature = 9/10 x 70 = 63F
After 4 minutes, temperature = 9/10 x 63 = 56.7F
After 6 minutes, temperature = 9/10 x 56.7 = 51.03F
425.69+298.72=724.41
29.72+135.47+208.28=373.47
724.41-373.47=350.94
350.94-5=345.94
The answer is c