This question is solved applying the formula of the area of the rectangle, and finding it's width. To do this, we solve a quadratic equation, and we get that the cardboard has a width of 1.5 feet.
Area of a rectangle:
The area of rectangle of length l and width w is given by:

w(2w + 3) = 9
From this, we get that:

Solving a quadratic equation:
Given a second order polynomial expressed by the following equation:
.
This polynomial has roots
such that
, given by the following formulas:
In this question:


Thus a quadratic equation with 
Then


Width is a positive measure, thus, the width of the cardboard is of 1.5 feet.
Another similar problem can be found at brainly.com/question/16995958
Answer:
0.58
Step-by-step explanation:
hundredths place is 2 after the decimal
any number 5 or higher will round up
so the 7 rounds up to a 8
Hope this helps!
The answer is 128 pi in^3. You have to multiply 4x4, then multiply that by 8 to get 128.
It would be 2/4. 2/4 simplifies to 1/2.