2.6925 is the mean/ avg you add all the numbers and divide by the amount of numbers you added
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 :)
Card P's balance increased by $3.43 more than Card Q's balance. The accumulated total on Card P over the 4 years is $1080.70 and the accumulated total of Card Q is $1,206.28. Based on the principal outlay however, Card P would have netted a higher interest over Card Q when the principal is subtracted from the accumulated value. (For eg. Card P accumulated value $1080.70 less Principal $726.19 equals $354.51).The interests over the 4 years period would be $354.51 and $351.08 respectively, hence Card P having an increase in balance of $3.43 over Card Q.
There are no examples to answer this.
3^(n+2)-3^n = (3^n).(3^2)-3^n = 9.3^n - 3^n = (9-1).3^n = 8.3^n
