1. How many pounds of 16-16-16 are needed to apply one pound of actual nitrogen to 1000 square feet of lawn?
2. How many pounds of 5-10-5 are needed to apply one pound of actual nitrogen per 1000 square feet of lawn?
3. How many pounds of 24-6-10 are needed to apply one pound of actual nitrogen per 1000 square feet to 6000 square feet of lawn?
4. Which fertilizer is the less expensive source of nitrogen?
   A. 10 pound bag of 36-10-10- for $15.50
   B. 15 pound bag of 15-10-5 for $10.00
   C. 20 pound bat of 21-0-0 for $17.50
5. How much ACTUAL nitrogen, phosphorus and potassium is in each of the following fertilizers?

A. 5-10-5

B. 10-18-20

C. 46-22-18