Answer:
11.3 feet
Step-by-step explanation:
This is a right triangle, so we can use the Pythagorean Theorem.
[tex]a^{2} +b^{2} = c^{2}[/tex] The hypotenuse (the longest side and the it is also the side across from the 90 ° angle) must be c.
[tex]4^{2} +b^{2} = 12^{2}[/tex]
16 + [tex]b^{2}[/tex] = 144 Subtract 16 from both sides
[tex]b^{2} = 128[/tex] Take the square root of each side
[tex]\sqrt{b^{2} }[/tex] = [tex]\sqrt{128}[/tex]
b = 11.3 rounded to the nearest tenth
