Answer: 6.93 years
Step-by-step explanation:
Given
Rate of interest is 
Future value is given by 
For the investment to double itself, i.e. 

It takes around 6.93 years to double the investment.
Hello I think the answer would be three.
Answer: $41.24
Step-by-step explanation: In order to figure out how much she is away from 500 we need to first subtract the 65.99.
524.75 - 65.99 = 458.76
Then find the difference from 500 by subtracting again.
500 - 458.76 = 41.24
41.24 is the amount she needs to deposit in order to avoid a fee.
Answer: y= 3 times 2 to the power x. Second answer
Step-by-step explanation:
if you plug in 0 for x, y= 3x 1= 3
if you plug in 1 for x y= 3 x 2 = 6
Look at the x values and y values
(0,3) and (1, 6) on the graph. It matches answer number 2. Remember, 2 raised to the power 0 = 1 and 3 times 1 = 3. And 2 raised to the power 1 =2 and 3 times 2 = 6.