Respuesta :

Interest rate = 5.25%

Step-by-step explanation:

Simple Interest = Pnr = 4252.50

n = time = 54 months = 4.5 years

r = rate of interest = ?

P = 18,000

r = SI/Pn = 4252.50 / 18000× 4.5

              = 0.0525 = 5.25%

Hope this will help u...

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