It is recommended that for a height of 20 inches a wheel chair ramp be 19 feet long. What is the value of x rounded to the nearest tenth? (Hint : All units must be the same)

Answer 1

no idea what x is supposed to represent. I'll guess that

x^2 + 20"^2 = 19'^2

So, if x is in inches,
x^2 + 20^2 = (19*12)^2

Or, if x is in feet,
x^2 + (20/12)^2 = 19^2