They show facts to prove that your opinion is right.
The answer is 8234 because if you calculated you will get that answer
For 1 bags of leaves
= $15/5
= $3
Martin can earn $3 for each bag
so,
For 24 bags of leaves
= $3 x 24
= $72
Area of a Triangle = 1/2(bh)
A = 1/2(5*3)
A = 15/2
A = 7.5