Answer:
c) All integers from 10 to 50, inclusive
Step-by-step explanation:
Rauls is selling coupon books.
He started with 50 coupon books and has already won a prize for selling at least 10 coupon books. It means He has a maximum value of 50 coupons and he already sold 10 coupons.He can sell from 10 coupons to 50 coupon books.
The total amount of money Raul will make from selling x coupon books as a function is
f(x) = 20x
The domain of this function is all Real numbers. However, we need a practical domain.Coupon books are integer numbers, 1, 2, 3 we will not have a half book. So, Coupon right now can vary from 10 coupon books to 50 coupon books. It means x can vary from 10 to 50, only integer values and inclusive 10 and 50.
Finally, the answer is C) all integers from 10 to 50, inclusive.
