Question

Now that the students know how many trees they will need for each of the abandoned lots, they need to create a budget for purchasing the trees. The trees they want to purchase cost 25 each, and the students are able to raise 50 a week toward this purchase. Write an equation that will solve for t, where t is the amount of time it will take the students to raise the money they need to purchase the trees for all 4 abandoned lots.

Answer 1

Assume the total number of trees they need for the abandoned lots is N.

A single tree costs $25. Thus, the total amount they need is

$$C=cN=25N.$$

However, the students can only raise $50 a week, so, the amount of time (in weeks) this will take is

$$t=\frac{C}{q}=\frac{25N}{50}=0.5N.$$