$\"\"$ $\"\"$

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The expression is n².

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= 7²(Substitute n = 7)

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Base is 7and the exponent is 2.

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7²means 7 multiplied together 2 times.

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$\"\"$

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$\"\"$ (Multiply: $\"\"$ ) $\"\"$

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= (0.4)²(Substitute n = 0.4)

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Base is 0.4 and the exponent is 2.

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(0.4)²means 0.4 multiplied together 2 times.

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$\"\"$

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$\"\"$ (Multiply: $\"\"$ ) $\"\"$

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The value of the expressions are $\"\"$ .