Answer: 3.5 lbs
Step-by-step explanation:
if oranges are $0.90 a pound, and the suspect spent $3.15, you can calculate the amount of oranges he bought by dividing:
315 divided by 90
=this gives you 3.5.
the suspect bought 3.5 pounds of oranges.
we cannot know the exact amount of oranges the suspect bought due to the fact that we do not know how many oranges come in a pound.