exam Maths Puzzle Numerical Ability

x+6y=7

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exam Other Question

find the simple interests if 1,000 is invested for 1 year at 6%. The amount A in an account after t years from an initial principle P invested at an annual rate r compounded continuously is given by A=Pe^(rt) where r is expressed as a decimal. Solve this formula for t in terms of A, P, and r.