Answer:
• 90 miles per hour.
,• 360 miles
Explanation:
After 1 hour, he has 270 miles left to travel.
After 2 hours, he has 180 miles remaining.
To determine the speed of the train, we find the rate of change.
The speed of the train is 90 miles per hour.
If the train travels 90 miles per hour, and after 1 hour, he has 270 miles to travel:
The distance of the train is:
Number of ways can the runners finish first, second, and third is 1,17,600 .
<u>Step-by-step explanation:</u>
Permutation is the act of arranging the members of a set into a sequence or order, or, if the set is already ordered, rearranging (reordering) its elements—a process called permuting. For example, written as tuples, there are six permutations of the set {1,2,3}, namely: (1,2,3), (1,3,2), (2,1,3), (2,3,1), (3,1,2), and (3,2,1). Formula of Permutation is : where n is the number of things to choose from, and we choose r of them, no repetitions, order matters. Here , n = 50 , r= 3
⇒
⇒
⇒
⇒
∴ Number of ways can the runners finish first, second, and third is 1,17,600 .