a rectangular prism has a volume of 112 cm every dimension of the rectangular prism is multiplied by a scale factor and the new volume is 1.75 cm3 . what was the scale factor

Respuesta :

The volume of the rectangular prism is

[tex]l \times b \times h =112 cm^3 [/tex]

Let the scale factor be

[tex]k[/tex]

If we multiply each of the dimensions by k, then we have,

[tex]lk, bk, hk[/tex]

as our new dimensions

Then the new volume is

[tex]lbh \times k^3 = 1.75 cm^3 [/tex]

But

[tex]lbh = 112 cm^3 [/tex]

[tex]\Rightarrow 112 \times k^3 = 1.75 cm^3 [/tex]

[tex]\Rightarrow k^3 =\frac{1.75}{112} [/tex]

[tex]\Rightarrow k^3 =\frac{1}{64} [/tex]

[tex]\Rightarrow k=\sqrt(\frac{1}{64})[/tex]

[tex]\Rightarrow k=\frac{1}{8}[/tex]

[tex] <B>Hence the scale factor is</B> [/tex]

[tex]\frac{1}{8}[/tex]