Answer:
The sets could be 5, 5, 5, 5, 5 and 0, 10, 20, -10, 5
Step-by-step explanation:
Standard deviations are a measure of how far the average point is away from the mean. In the first example, each term is exactly the mean. In the second set, some are quite a distance from the mean and therefore, it would have a bigger standard deviation.
Alright, lets get started.
Jessica can swim a lap in
seconds
Converting it into decimals, 
Means
seconds
Means Jessica can swim a lap in 29.4 seconds
Marta can swim a lap in 28.7 seconds.
So, Martha is faster than Jessica by
seconds
It means Marta is 0.7 seconds faster than Jessica. : Answer
Hope it will help :)
Easy
The total area of the first shape is 42 and the total area of the second shape is 21.