Answer:
Interest amount to $15.5.
Miguel must pay $515.5 Julio at the end of 6 months.
Step-by-step explanation:
Given :Miguel Rodriguez borrowed $500.
He agreed to pay back in 6 months with simple interest at 6.2.
To Find :How much will the interest amount to? What amount must Miguel pay Julio at the end of 6 months?
Solution:
Principal (P)= $500
Rate of interest(R)= 6.2%
Time= 6 months = 0.5 years
Formula : 


So,the interest amount to $15.5
Amount = Principal +Interest
Amount = $500+$15.5
Amount = $515.5
So, Miguel must pay $515.5 Julio at the end of 6 months.