Using the Pythagorean therom.

81 + b^{2} = 196
b^{2} = 115
b =

Hope this helps!
Answer:

Step-by-step explanation:
1. Since this is a Dilation with a scale factor of 4 (D4) let's plot the triangle TUV.
Check the picture 1
2. The Center of Dilation of this transformation is at the center. But the transformation is given by a scale factor of 4 and adding to (-3,1)
So,

3. Back to the graph to visualize this transformation a Dilation, an enlargement and the transformation combined.
4.5 feet. Divide 108 by twelve and you find out that the board is 9 feet long. Half of 9 is 4.5. Therefore, each piece is 4.5 feet long.<span />
Remove parentheses by multiplying factors.use exponent rules to remove parentheses in terms with exponents.combine like terms by adding coefficients.combine the constants
Answer: B
Step-by-step explanation: