20 pounds
Each bag contains 5 pounds of Nitrogen, so 4 bags would contain 4 x 5 = 20 pounds of Nitrogen.
.
The ratio of Nitrogen to Phosphorus in a bag of lawn fertilizer is 5 pounds of Nitrogen to 2 pounds of Phosphorus. What is the total number of pounds of Nitrogen in 4 bags of lawn fertilizer?
7
10
20
40
...
1 answer