A relation is a function if the value in its Domain does not occur more than once. This means each domain value is paired with exactly one value of range.
In the given scenario, the domain is the students (e.g name of a student) and the function returns the date of birth of the student. A student can have only one date of birth. So it is not possible that a value in Domain(i.e. a student) is paired with more than one date of births.
Therefore, we can conclude that the given relation describes a function.
Answer:
8.2 × 10-3
Step-by-step explanation:
Uh I don't know the step by step but I know the exponent is a negative because the 0's are on the left and if they are on the right it is not negative.
HOPE THIS HELPS
Knowing that your area is:

you can find the radius as:

;
With this you can evaluate the circumference as:
15 has 1,3,5,15
18 has 1,2,3,6,9,18
12 has 1,2,3,4,6,12
The number of books which Mr. Hartzel has now is:
<h3>What is Algebra?</h3>
This refers to the use of calculations to solve mathematical problems. There are different ways in which algebra is used and this can include addition, subtraction, division, etc.
With this in mind, we can see that Mr Hartzel had 12 books in his library
Then he got 9 new books and then sold off 6 books.
Therefore, the total number of books which he has now is:
12+9-6= 15 books
Read more about algebra here:
brainly.com/question/6143254