Answer:
Speed of air = 1106.38 ft/s
Explanation:
Speed of sound in air with temperature

Here speed is in m/s and T is in celcius scale.
T = 50°F

Substituting

Now we need to convert m/s in to ft/s.
1 m = 3.28 ft
Substituting

Speed of air = 1106.38 ft/s
I do a yoga mat that could be different to your answer
Hiya!
The answer to your question is B.
Physical Properties.
~Hope this helps~
Biotic is the living factors while abiotic is nonliving such as a rock