$\"\"$

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(a)

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The total Income is $\"\"$ .

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Time period is $\"\"$ years.

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Rate of interest $\"\"$ .

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Find principal income compounded monthly.

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Compound interest is $\"\"$ .

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Rewrite the equation $\"\"$ .

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For monthly compounded $\"\"$ .

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Substitute all the values in the equation.

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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The prinicipal income is $\"\"$ .

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$\"\"$

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(b)

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The total Income is $\"\"$ .

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Time period is $\"\"$ years.

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Rate of interest $\"\"$ .

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Find principal income compounded continuously.

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Compound interest is $\"\"$ .

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$\"\"$

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Substitute all the values in the equation.

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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The prinicipal income is $\"\"$ .

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$\"\"$

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(a) The prinicipal income is $\"\"$ .

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(b) The prinicipal income is $\"\"$ .