Answer: 504
Step-by-step explanation:
When we select r things from n things in a order , we use permutations.
Formula for permutation: 
Given : The number of family members who are potential kidney donors. = 9
Number of people needed to be selected for best match, a second-best match, and a third-best match ( in an order)=3
Then, the number of possible orders are = 

Hence, the number of possible orders 504.
It is the fourth option, y+8=3(x-8)
Answer: 1 : 20%
2 : 80%
3 : -90% (negative 90%), if no negatives are allowed, than it is a 90% decrease.
4 : $90
5: $31.50
Step-by-step explanation:
The revenue will be 12,000 when the price of the product is $100
Given :
The monthly revenue of a certain company

We need to find out p when <u>Revenue R is 12000</u>
Lets replace R with 12000 and solve for p

Apply <em>quadratic formula </em>

Given that price must be greater than 50
So the revenue will be 12000 when the price of the product is $100
Learn more : brainly.com/question/21503855