I don't understand the ones that are circled.

Melvin Company reported sales in 2014 of $300, 000. This compound to sales of $150, 000 in 2013 and $100, 000 in 2012. Construct a line graph for Melvin Company. LUS-I(2) The mean useful life of car batteries is 48 months. They have a standard deviation of 3, If the useful of batteries is normally distributed, calculate (a) the percent of batteries with a useful life of less than 45 months and (b) the percent of batteries that will last longer than 54 months. LU 5-3(2) The average weight of a particular box of crackers is 24.5 ounces with a standard deviation of 0.8 ounces The weight of the boxes are normally distributed. What percent of the boxes (a) weight more than 22.9 ounces and (b) weigh less than 23.7 ounces? LU 5-3(2) An examination is normally distributed with a mean score of 77 and a standard deviation of 6. Find the percent of individuals scoring as indicated below. LU 5.3(2) a. Between 71 and 83 b. Between 83 and 65 c. Above 89 d. Less than 65 e. Between 77 and 65 Listed below are the sales figures in thousands of dollars for a group of insurance salespeople. Calculate the mean sales figure, the variance, and the standard deviation. Round to the hundredths. LU 5-3(1, 2) The time in seconds it takes for 20 individual sewing machines to stitch a border onto a particular garment is listed be Calculate the mean stitching time, the variance, and the standard deviation to the nearest hundredth. LU 5-3(1.2)