what is the length of the hypotenuse? if necessary, round to the nearest tenth. c = yards

what is the length of the hypotenuse? if necessary, round to the nearest tenth. c = yards
Answer
Explanation:
Step1: Apply Pythagorean theorem
$c^{2}=a^{2}+b^{2}$, where $a = 2$ and $b = 4$. So $c^{2}=2^{2}+4^{2}$.
Step2: Calculate the right - hand side
$2^{2}+4^{2}=4 + 16=20$. So $c^{2}=20$.
Step3: Solve for c
$c=\sqrt{20}\approx4.5$ (rounded to the nearest tenth).
Answer:
$4.5$