There are 10 contestants in a race. You want to determine how many ways there could be a
1st, 2nd, and 3rd place winner. Important: First decide whether you are doing a Permutation or Combination, then go ahead and calculate the Permutation or Combination

720 different ways

Step-by-step explanation:

To decide whether you are doing a Permutation or Combination, ask yourself if order matters. If the order of things is important then it is a permutation question, if the order doesn't matter then it is a combination question.

In this case, the order is important because there is a difference who will be the first place winner, the second place winne and the third place winner.

Use permutation formula:

arithmetic sequence

step-by-step explanation:

given that a sequence has terms as

19, 15, 11,

this is represented on a graph

the pattern indicates that the sequence is an arithmetic sequence with i term

a=19 and common difference d =-4

any general term

thus the sequence is reduced by 4 for each successive term starting from 1 and nth term is

24-5n.

first negative term would start after 5th term

5th term =24-25< 0

from 5th term onwards the sequence would be negative.

step-by-step explanation:

i'm pretty sure it would take 20 hours because it's half the men so you multiply the number of hours it takes by 2