Let us say that the variables for flight is designated by
1, while the return flight by 2, since the distance travelled are equal, therefore:
v1 t1 = v2 t2
or
460 t1 = 500 t2
Since t1 + t2 = 4.8, therefore: t1 = 4.8 – t2
460 (4.8 – t2) = 500 t2
2208 – 460 t2 = 500 t2
960 t2 = 2208
t2 = 2.3
t1= 4.8 – t2 = 4.8 – 2.3
t1 = 2.5
Answer:
The flight took 2.5 hours while the return flight took
2.3 hours.
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Answer:
2.835
3.330
Step-by-step explanation:
Let the linear approximation be L(x) at a = 0. This is given by
is the derivative of 
. To find this, we use the form
If 
, then 
By doing this and applying chain rule for the power (which is a function of x), we have
Then
Also 
Hence 
For 
, 
and 
Using this in 
,
For 
, 
and 
Using this in ,
6210001000
6 0s
2 1s
1 2s
0 3s
04s
05s
1 6s
0 7s
0 8s
0 9s
