If he only puts 25 gallons of water in the tank each time, he needs to adjust the amount of fertilizer accordingly.
First, let's find out the ratio of fertilizer to water in the recommended solution:
3/4 cup fertilizer : 5 gallons water
To make 1 gallon of this solution, we need to divide both parts by 5:
3/4 cup fertilizer ÷ 5 = 0.15 cup fertilizer
5 gallons water ÷ 5 = 1 gallon water
So the ratio is:
0.15 cup fertilizer : 1 gallon water
To make 25 gallons of this solution, we need to multiply both parts by 25:
0.15 cup fertilizer x 25 = 3.75 cups fertilizer
1 gallon water x 25 = 25 gallons water
So Mr. Jones needs to add 3.75 cups of fertilizer to the tank before filling it with water.
Mr. Jones has to mix a fertilizer solution for his garden. The instructions on the package say to dissolve three-fourths of a cup of fertilizer in 5 gallons of water. He has a 40-gallon tank that he pulls with a yard tractor. He only puts 25 gallons of water in the tank each time. How many cups of fertilizer does he need to add to the tank before filling it with water?
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