Which of the following are true about the graph of f(x)=−4x2?
Select the TWO that apply.

the answer is A and D

when you differentiate the question you find that the maximum point is (0,0)i.e

when dy/dx is 0 values of x are 0,0

and the function shows that valies of x are real numbers.

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles