To convert

to a percent, you must convert it to a decimal first
Divide the numerator(top) by the denominator(bottom)
5÷20=.25
All percents are based off of "100%" so multiply .25 by 100(%) which is 25%
Answer: 25%
Answer: D
Step-by-step explanation: 
Using the laws of indices, you can solve it.
Hi,
This is using 'n', so there would be a lot of possibilities, but I would form a circle with the group of people, then each person would shake the person to their right, and then to their right, one time. This method would not vary because a circle can contain even or odd number of people.
Hope this helps!
Answer:
passenger train is travelling 58mph
freight train at 38 mph
Step-by-step explanation:
first i listed all the numbers that could divide 190
1,2,5,10,19,38
& then it was simple from there .
next all i had to do is add 20 to each number and then see if that number could divide 290
38 could divide 190
38+20 =58
290÷58=5
190 ÷38=5
it took the passenger train 5 mins to travel 290 miles while the freight train took 5 mins to trvel 190 miles