EM-16

Finding an unknown in a formula

E Math · Secondary 3 · Hard · Finding an unknown in a formula

The simple interest earned,

I

, on a sum of money is given by

I = PRT

, where

P

is the principal,

R

is the interest rate per year (in decimal), and

T

is the time in years. If

P = 1500

R = 0.04

and

I = 180

, find

T

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