Answer:
Minimum 8 at x=0, Maximum value: 24 at x=4
Step-by-step explanation:
Retrieving data from the original question:
1) Calculating the first derivative
2) Now, let's work to find the critical points
Set this
0, belongs to the interval. Plug it in the original function
3) Making a table x, f(x) then compare
x| f(x)
-1 | f(-1)=9
0 | f(0)=8 Minimum
4 | f(4)=24 Maximum
4) The absolute maximum value is 24 at x=4 and the absolute minimum value is 8 at x=0.
Answer:
Average speed = miles per hour
Step-by-step explanation:
Formula to calculate the average speed of an object is,
Average speed =
If I travel with the speed of x mph for t hours,
Total distance covered = Speed × Time
=
= miles
Similarly, if I travel with the speed y mph for t hours,
Total distance covered = miles
Total distance covered by me = miles
Total time taken to cover this distance =
= hours
Therefore, expression for the average speed will be,
Average speed =
=
= miles per hour