Last one plz help guys

Answer:
4.1
Step-by-step explanation:
You can use the Pythagorean Theorem to solve this:
[tex]a^{2} + b^{2} = c^{2}[/tex]
Plug in the numbers into the formula:
[tex]4^{2} + 1^{2} = c^{2}[/tex]
16 + 1 = [tex]c^{2}[/tex]
17 = [tex]c^{2}[/tex]
Square both sides:
[tex]\sqrt{17} = \sqrt{c^2}[/tex]
4.12 = c
4.1 = c