Select the correct answer.

Wanda is a cake designer with a specialty in rectangular silk screen photo cakes. For every cake that she makes, the width of the cake is 4 inches more than the width of the photo in the center of the cake, and the length of every cake is two times its width. The area of the cake Wanda is currently working on is at least 254 square inches.

If [tex]x[/tex] represents the width of the photo, which inequality represents this situation?

A. [tex]x^2 + 4x \geq 254[/tex]

B. [tex]2x^2 + 16x + 32 \geq 254[/tex]

C. [tex]x^2 + 8x + 16 \geq 254[/tex]

D. [tex]8x^2 + 64x + 128 \geq 254[/tex]



Answer :

To determine the correct inequality that represents the given situation:

1. Let [tex]\( x \)[/tex] denote the width of the photo in the center of the cake.

2. According to the problem:
- The width of the cake is 4 inches more than the width of the photo.
Therefore, the width of the cake is [tex]\( x + 4 \)[/tex].

- The length of the cake is two times its width.
Therefore, the length of the cake is [tex]\( 2(x + 4) \)[/tex].

3. The area of the cake is calculated by multiplying its length and width:
[tex]\[ \text{Area of the cake} = \text{Length} \times \text{Width} \][/tex]
Substituting the expressions for length and width:
[tex]\[ \text{Area of the cake} = 2(x + 4) \times (x + 4) \][/tex]

4. The area of the cake must be at least 254 square inches, so we set up the inequality:
[tex]\[ 2(x + 4)(x + 4) \geq 254 \][/tex]

5. Simplify the expression inside the inequality:
[tex]\[ 2(x + 4)^2 \geq 254 \][/tex]

6. Expand the quadratic expression:
[tex]\[ 2(x^2 + 8x + 16) \geq 254 \][/tex]

7. Distribute the 2:
[tex]\[ 2x^2 + 16x + 32 \geq 254 \][/tex]

Therefore, the correct inequality is:

B. [tex]\(2x^2 + 16x + 32 \geq 254\)[/tex]

So the correct answer is option B.