Answer:
18-4y
Step-by-step explanation:
18 -4y because your start with 18, and each day 4 get eaten. so day 2 (4*2) there will be 8 less, etc, etc
You know what product means right? (+,-,×,÷)
Answer:
In the question 4/0, the denominator is zero so it is not a rational number.
<h2>
Hello!</h2>
The answer is: A. 2π
<h2>Why?</h2>
First, in order to make it easier, let's convert the numbers into entire or decimal numbers.

So, ordering it:
C, D, A, B

So, Y=A=6.28
Have a nice day!