Arectangle has a length of (3.2a 1 0.18b) centimeters. the width is half the length. sasha writes the expression (12.8a 1 0.72b) to represent the perimeter of the rectangle in centimeters. is sasha’s reasoning correct? explain.

No, her reasoning is incorrect.

Step-by-step explanation:

Given,

The length of the rectangle,

,

Here, the width is half the length.

⇒ Width of the rectangle,

We know that,

The perimeter of a rectangle is,

Since, 9.6a + 0.54b ≠ 12.8a + 0.72b

Hence, her reasoning is incorrect.

the dimensions are:

step-by-step explanation:

we want to find the dimensions of a rectangular box with volume of

we factor to obtain;

we rewrite the rightmost factor to obtain;

recall that:

we apply difference of two squares formula to obtain;

hence the dimensions are

c

step-by-step explanation: