Mona her mother landscape their yard. before they began they purchased 5 bags of soil weighing 15.25 pounds each. they had a 7.5 bag of soil left from last season. if they used 45.5 pounds of soil for the beds in the front yard and 20.25 pounds for the bed in the back yard, how many pounds of soil were left over? a. 10.75 pounds b. 38.25 pounds c. 10 pounds d. 17.5 pounds