What numbers go into 130 and 26 (i can't figure it out)

3-12. write each answer with a reasonable number of figures. find the absolute uncertainty and percent relative uncertainty for each answer. (a) [12.41 (±0.09) + 4.16 (±0.01)] x 7.068 2 (±0.000 4) =? (b) [3.26 (±0.10) x 8.47 (±0.05)] - 0.18 (±0.06) =? (c) 6.843 (±0.008) x 104 + [2.09 (±0.04)- 1.63 (±0.01)] =?

The verbal translation for the difference of m and 7 increased by 15

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?