Gretta has 40 raffle tickets to sell. She is required to sell at least 15 tickets. She sells the raffle tickets for $10 each.
The amount of money Gretta makes from selling x raffle tickets is represented by a function.
f (x) = 10x
What is the practical range of the function?
a. All integers from 15 to 40, inclusive.
b. All multiples of 10 between 0 and 400, inclusive.
c. All real numbers.
d. All multiples of 10 between 150 and 400, inclusive.
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