John borrows 2500 from his dad who feels it is best to charge him interest. six months later, john repays him dad the loan plus interest a total of 2588. what was the annual interest rate on the loan?

7.04%.  

Step-by-step explanation:

We have been given that John borrows 2500 from his dad who feels it is best to charge him interest. Six months later, John repays him dad the loan plus interest a total of 2588.

To find the annual interest rate, we will use simple interest formula.

, where,

A = Amount after t years,

P = Principal amount,

r = Annual interest rate,

t = Time in years.

Let us convert our given time in years.

1 year = 12 months

Upon substituting our given values in above formula, we will get:

Switch sides:

Now, we will convert our given rate in percentage by multiplying by 100.

Therefore, the annual interest rate on the loan is 7.04%.

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.

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step-by-step explanation: