I think around 44% chance that all three flights would arrive on time, but i'm not that sure.
Answer:
a) 4.392317 mt
b) 9 seconds
c) 
Step-by-step explanation:
We have

where t is given in seconds and t in meters.
<em>a)How far has the point traveled 21 seconds after it started moving?</em>
By replacing t=21 in our equation we get

<em>b)If the point has traveled 3.16993 meters, how many seconds have elapsed since it started moving?</em>
We need to find a t such that f(t) =3.16993.
This can be accomplished by using the definition of 

<em>c)Write a function
that determines the number of seconds that have elapsed since the particle started moving in terms of the distance (in meters) the particle has traveled.</em>
is given by the definition of log

Answer: -2
Step-by-step explanation: Let the unknown number be " a"
From the statement,
a^2 - 12 = 4a ..... this is a quadratic equation
i.e a^2 - 4a - 12 = 0
factorizing the quadratic expression
( a + 2 ) ( a - 6 ) = 0
i.e a = -2 or 6
so, the negative solution is -2
Perpendicular is the answer