An initial investment of $1000 grows at an interest rate of 4% per year. How long will it take that investment to reach $1,500? Assume that you make no further deposits or withdrawals from the investment account. Round to the nearest tenth of a year. a. 12.6 years
b. 5.4 years
c. 9.8 years
d. 10.3 years

How to do this , and can some one explain

The volume of a box varies directly with its length if a box in the group has a length of 30inches and k=24 what is its volume

Will give brainliest for correct answer 8. use the distance time graph to answer these questions: a. what does the graph tell us about the velocity of the car? b. what is the average velocity of the car? (show work) c. is the velocity reflected in the graph positive or negative?d. is there any point on the graph where the car is not moving? how do we know?