Answer: 64
Step-by-step explanation:
I'm assuming your answers are listed as 1 through 4, not decimals.
You simply take 12 - 8 = 4, but ten min. less than that, so 3 hr, 50 min. then add 3 hr 45 min, totaling 7 hr 35 min. , which is closest to 7 and 1/2 hours, the second option.
Mass error is due to temperature which is a random error. I believe.
I didn’t know which problem you specifically needed help with, but I hope this helps.
The graph is the intersection of the interior of a circle with a half-plane.