contestada

1 (a). Determine if each of the following is true or false. Explain your reasoning.i. There are 12 cubic inches in a cubic foot.ii. There are 144 squares inches in a square foot. iii. If I triple the length and width of a rectangle, then the area increase by a factor of 3.iv. If I triple the length and width and height of a cube, then the volume increases by a factor of 27.

Respuesta :

(i)

1 cubic foot is equivalent to 1728 cubic inches, this is why the statement is false.

(ii)

1 square foot is equivalent to 144 square inches, so the second statement is also false.

(iii)

The third statement is also false because if we triple both dimensions of a rectangle, the area will be increased by a factor of 9.

[tex]A=3w\times3l=9wl[/tex]

(iv)

This statement is true because when we multiply 3x3x3 we actually get a factor of 27

[tex]V=3w\times3l\times3h=27\text{wlh}[/tex]

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