What is 12 x 19? im bored and i cant do anything else on a Chromebook so giving away points on this website lol

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)] =?

In the figure shown below, m < 40 and ab =8. which equation could be used to find x?

Is the square root of 4 plus the square root of 16 rational?