Question

problem 6
function c gives the cost, in dollars, of buying n apples.
which statement best represents the meaning of c(10) = 9?
a the cost of buying 9 apples
b the cost of 9 apples is $10
c the cost of 10 apples
d ten apples cost $9

Explanation:

The function \( C(n) \) represents the cost (in dollars) of buying \( n \) apples. So \( C(10) \) means we are evaluating the cost when \( n = 10 \) (i.e., for 10 apples), and \( C(10)=9 \) means that cost is $9. Let's analyze each option:

• Option A: It refers to 9 apples, but \( C(10) \) is about 10 apples, so A is incorrect.
• Option B: It says 9 apples cost $10, but \( C(10) \) is for 10 apples and the cost is $9, so B is incorrect.
• Option C: It just says "the cost of 10 apples" but doesn't mention the amount, while \( C(10) = 9 \) gives the cost as $9. So C is incomplete.
• Option D: It correctly states that ten apples cost $9, which matches the meaning of \( C(10)=9 \) (since \( n = 10 \) apples and \( C(10)=9 \) dollars).

Answer:

D. Ten apples cost $9