<span>Okay, firstly, you want to work out how many people will 1 vial of malaria treat. So, you do this:
150 divided by 9= </span><span>16.6
</span><span>That means for every 1 vial, 16.6 people are treated. </span> <span>Since the question asks you to find out how many vials are needed if you're required to treat 230 people, you would do this: </span> 230 divided by 16.6= <span>13.8
</span>That means you need 13.8 vials to treat 230 people.
The initial number of trees is when t = 0:- 1500 * t^0 = 1500 so the answer is either a or c. The value 1.02 represents a 2% increase so the answer is Option c.