SOMEBODY HELP NO LINKS PLZ AND THANK YOU which function describes the sequence 7,14,28,56 fo n=1,2,3,4.."

A f(n) =7n
B f (n) = 2^n +5
C f (n )= 7x2 ^ n-1
D (n-1)^2 +7

Divide the following fractions 3/4 ÷ 2/3 1/2 8/9 9/8 2

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.