The side length of a cube is √7 cm.

Which answer is a rational value?

The volume.

The perimeter of the front square.

The diagonal of the back square.

The total area of the top and bottom squares.

Question

21-11-2016
Mathematics

contestada

The side length of a cube is √7 cm.

Which answer is a rational value?

The volume.

The perimeter of the front square.

The diagonal of the back square.

The total area of the top and bottom squares.

Respuesta :

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Kalahira Kalahira · Answer 1 · 2017-04-18T22:19:42+02:00

The answer is The total area of the top and bottom squares. s = √7 cm is irrational value and we need rational value. Let's check all choices: A. The volume. V = (s)^3. If s = √7, V = (√7)^3 = 7√7 - irrational value. B. The perimeter of the front square. P = 4 * s = 4 * √7 = 4√7 - irrational value. C. The diagonal of the back square. d = s√2 = √7 * √2 = √(7*2) = √14 - irrational value. D. The total area of the top and bottom squares. A = 2 * s^2 = 2 * (√7)^2 = 2 * 7 = 14 - rational value.

The side length of a cube is √7 cm. Which answer is a rational value? The volume. The perimeter of the front square. The diagonal of the back square. The total area of the top and bottom squares.

Respuesta :

Otras preguntas

The side length of a cube is √7 cm.

Which answer is a rational value?

The volume.

The perimeter of the front square.

The diagonal of the back square.

The total area of the top and bottom squares.