Question

PLEASE HELP!!! 20 POINTS WILL BE GIVEN!
For questions 1-4, find the interest. All rates are annual interest rates.

1.Principal $400 Rate 5% Time 1 year
$10
$20
$40
$200
2.Principal $1,000 Rate 8.5% Time 3 years
$255
$170
$22.5
$17
3. Principal $200 Rate 9% Time 1/2 year
$9
$18
$36
$45
4. Principal $20,000 Rate 12% Time 3 months
$240
$600
$800
$7,200
5. You borrow $1,200 at a rate of 4.5% for a period of 6 months. How much will you repay at the end of 6 months?
$240
$600
$800
$7,200

Answer 1

SI = PRT /100

1. SI = 400*5*1/100
        = 2000/100
        = $ 20

2. SI = 1000*8.5*3/100
        = 25.5*1000/100
        = $ 255

3.  SI = 200*9*1/2*100
         = 900/100
         = $9

4.  SI = 20000*12*3/100
         = 200*12*3
         = 7200

5.  SI = 1200*4.5*6/12*100
         = 4.5*6
         = $27
  
Amount to pay = Principal + SI
                        = 1200+27
                        = $1227 ( But this answer isn't there in the options )

Answer 2

the answers are

1 is B
2 is A
3 is A
4 is B
5 is D

I worked them all out and they are right