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iris [78.8K]
3 years ago
14

A rectangle has a length of the cube root of 81 inches and a width of 3 to the 2 over 3 power inches. Find the area of the recta

ngle.
A. 3 to the 2 over 3 power inches squared
B. 3 to the 8 over 3 power inches squared
C. 9 inches squared
D. 9 to the 2 over 3 power inches squared
Mathematics
2 answers:
Paladinen [302]3 years ago
8 0

Answer:

The correct answer is C. The area of the rectangle is 9 inches squared

Step-by-step explanation:

The formula for the area of a rectangle is A =L x W

where L is the length and W the width

we were given the length to be equal to \sqrt[3]{81}

this can be further simplified to \sqrt[3]{9^{2} }

The width was given to be 3\frac{2}{3}.

This can be further simplified using the law of indices to be (3^{2}) \frac{1}{3} =9^{\frac{1}{3} } =\sqrt[3]{9}

The area A = \sqrt[3]{81} *\sqrt[3]{9} = (81*9)^{\frac{2}{3} }  = (\sqrt[3]{729})^{2} =9^{2}

Therefore, the area of the rectangle is 9 inches squared

Tamiku [17]3 years ago
6 0
Area of a rectangle is length times width:
3 to the (2 over 3) power is ∛3²
A=∛81*∛3²
A=3∛3 * ∛3²=3∛3³=3*3=9
the answer is C.

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