Question

# A helicopter is 800 m above ground and descending at 55 m/min. An airplane is taking off and rising 80 m/min.

Equation, expression, and inequalitie
A helicopter is 800 m above ground and descending at 55 m/min. An airplane is taking off and rising 80 m/min.

$$\displaystyle\frac{{800}}{{135}}$$ gives you: t=5.925