Answer:
The answer is c
Step-by-step explanation:
18 is not a function because a function is when exactly ONE x value is paired with ONE y value.
19 is not a function because of the same logic for number 18
<span>60 divide 9840 = </span>0.00609756
He bought 5 science books and 2 Math Books
5 Science Books = $300
2 Science Books = $100
7 Books = 400
30% of $15 is $4.50,hope this helps!