Amechanic repaired 28 cars and 46 trucks last month. he spent 2.5 hours repairing each of these vehicles. which equation can be used to find h, the total number of hours the mechanic spent repairing these vehicles?

The yearly amounts of carbon emissions from cars in belgium are normally distributed with a mean of 13.9 gigagrams per year and a standard deviation of 5.8 gigagrams per year. find the probability that the amount of carbon emissions from cars in belgium for a randomly selected year are between 11.5 gigagrams and 14.0 gigagrams per year. a. 0.340 b. 0.660 c. 0.167 d. 0.397