Answer:
24 interest after 4 years
Step-by-step explanation:
I just took 400 and multiplied it to 1.5%(.015) to get 6 and then multiplied that to 4 to get 24 and you could it if you want. Ask if you have a question.
Answer: t, and u
Below is an attachment containing the solution.
30
6; 1, 2, 6
12; 1, 2, 3, 4, 6, 12
18; 1, 2, 3, 6, 9, 18