Question

2 select the correct answer from the drop - down menu. the smiths want to replace the stairway that leads from their porch to their sidewalk with a ramp. the porch is 3 feet off the ground. they decide to start the ramp 12 feet away from the base of the porch to make it convenient to walk up. the ramp will be approximately feet long.

Explanation:

Step1: Apply Pythagorean theorem

Let $a = 3$, $b=12$, and the length of the ramp be $c$. Then $c=\sqrt{a^{2}+b^{2}}$.

Step2: Calculate value of $c$

$c=\sqrt{3^{2}+12^{2}}=\sqrt{9 + 144}=\sqrt{153}\approx12.4$.

Answer:

12.4