Answer:

Step-by-step explanation:
A zero or a root is determined at the point where the curve cuts or meets the x-axis or horizontal axis.
Answer is 4 books per minute. 240 (books) divided by 60 (minutes in one hour) equals 4
You have to go past the decimal point in since the first number in the tenths place is a zero you can't really round here so you go to the hundreds place and not so three you round down because 3 is closer to 0 then it is 10 so it would be 1. 4
Sides that two side is equal so
5x+10=40
5x=30
X=6