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.
Answer:
<u>the frequency</u> is the number of times a particular value occurs in a given data.
Answer:
8953.5 seconds
Step-by-step explanation:
Since the challenger descends at a rate of 4 feet per second, divide 35,814 by 4 to get the answer