Answer:
S'(x)=-0.006x2+0.8x+9
Step-by-step explanation:
The rate of change of the sales S(x) with respect to the amount of money spent on advertising x is then the derivative of S(x) with respect to x. What we have to calculate is S'(x).
We know that the derivative of
is
(where a is a constant), and the derivative of a sum is the sum of the derivatives, so we can calculate the derivative of each term independently:
S'(x)=(−0.002x3 + 0.4x2 + 9x + 500)'=(−0.002)(3)x2 + (0.4)(2)x + 9
Which means:
S'(x)=-0.006x2+0.8x+9
Answer: Graph B and Graph D
Hello!
The mean is the average of the data
To find the average you add all the numbers and divide the sum by the amount of numbers you added
14 + 19 + 13 + 22 + 7 = 75
You add 5 numbers so
75/5 = 15
The answer is 15
Hope this helps!
Answer:
sin -1 degrees.
Step-by-step explanation:
sin (A - B) = sin A cos B - cos A sin B
Therefore sin 9° cos 10°- cos 9º sin 10° = sin (9 - 10)
= sin -1 degrees.
Answer:
x=-18-1/2y
Step-by-step explanation:
4x-72=8x+2y
-4x=72+2y
-x=18+1/2y
x=-18-1/2y