please explain . help explain

PRACTICE EXERCISES: B-1. Consider the following results for different experiments. Determine if they agree with the accepted result listed to the right. Also calculate the precision for each result. a) g = 10.4 +1.1 m/s g = 9.8 m/s- b) T =1.5 + 0.1 sec T = 1.1 sec c) k = 1368 = 45 N/m k = 1300 # 50 N/m B-2. The area of a rectangular metal plate was found by measuring its length and its width. The length was found to be 5.37 + 0.05 cm. The width was found to be 3.42 + 0.02 cm. What is the area and the average deviation? B-3. Each member of your lab group weighs the cart and two mass sets twice. The following table shows this data. Calculate the total mass of the cart with each set of masses and for the two sets of masses combined. Cart Mass set 1 Mass set 2 (grams) (grams) (grams) 201.3 98.7 95. 201.5 98.8 95.3 202.3 96.9 96.4 202.1 97.1 96.2 199.8 98.4 95.8 200.0 98.6 95.6