Answer:
20 books
Step-by-step explanation:
Height of stack = 35 inches
Thickness of one book
No. of books

18 inches * 96 = 1728. 1728 / 12 = 144 feet^2. If you need me to explain better let me know.
Answer:
Yes
Step-by-step explanation:
This relation is a function. Functions must have unique x-values for every y-value, this relation meets those requirements. Also, since this is a graph you can use the vertical line test. To pass the vertical line test you must be able to draw a vertical line on the graph and have it intersect with the function in no more than one place.
To solve, use the distance formula:

. Using your values of x and y, you get

, which is approximately 9.22. This means your shortest distance is √85≈9.22