Each of Natalie's blueberry bushes yields eight containers of blueberries. If she can trade five containers of blueberries for two zucchinis, how many bushes does Natalie need to pick in order to have forty-eight zucchinis?
1 bush / 8 con * 5 con / 2 zuc * 48 zuc
= 1/8 * 5/2 * 48 = 15 bushes
+4 
