Answer:
50 feet
Step-by-step explanation:
The airplane decreases at 300 ft per second, so it would be decreasing in altitude 50 feet per/s
a and b
It is Commutative property of multiplication.
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f(x)=xf(x)=x , g(x)=2xg(x)=2x
f(x)=5f(x)=5 , g(x)=xg(x)=x
not sure but still,