The following function gives the cost based on the number of x items purchased.
C(x) = 2^x + 5, what does C(x) represent in context of the problem?
a. The cost of purchasing 4 items.
b. 4 items are being purchased.
c. 2^4
d. 2 * 4 + 5
The correct answer is a. The cost of purchasing 4 items.
In the given function C(x) = 2^x + 5, we can see that the input variable is x, which represents the number of items purchased. Therefore, when we substitute 4 into the function, C(4) = 2^4 + 5, the result will be the cost of purchasing 4 items.