Core Focus: Simple Interest

I have 5 question”S like this. . . I will pay 2$ for all to be answered. . .  

Thanks!  

#1 —->  

Marco deposited $500 in a savings account earning 4% interest over 5 years. 

What was the total amount of interest earned at the end of 5 years?

 A.

$40

 B.

$50

 C.

$100

 D.

$200