Answer:
87.5
Step-by-step explanation:
By completing the square,
y
=-14x^2+70x
=-14(x^2-5x)
=-14(x-5/2)^2+175/2
the max. height=175/2
i.e. 87.5
Answer:Are there any options?
Step-by-step explanation:
Answer:
12.4=12 hours and 24 minutes
Step-by-step explanation:
Answer:

Step-by-step explanation:
