Answer:

Step-by-step explanation:
To solve a formula for one of its variables do that
- Separate it on one side and the other terms on the other side
- Make its coefficient equals 1
Let us use these steps to solve our question
∵ V =
b²h
→ Underline b
∴ V =
<u>b²</u>h
→ Multiply both sides by 3 to cancel the denominator on the right side
∴ 3V = <u>b²</u>h
→ Divide both sides by h to move it to the other side
∴ 
→ To find b take √ for both sides
∴ 
→ The square root will cancel the power 2 of b
∴ 
→ Switch the two sides
∴ 
Answer:
A. 11.33
Step-by-step explanation:
In the blue rectangle, the ratio of the height to the width is 21/34.
In the red rectangle, the ratio of the height to the width is 7/w.
We are told the ratios are equal, so we set the ratios equal and solve for w.
7/w = 21/34
Cross multiply.
21w = 7 * 34
21w = 238
Divide both sides by 21.
w = 238/21
w = 11.333...
Answer: A. 11.33
I believe its 24 inches because you add up 7+10+7 to get 24.