Answer:
Step-by-step explanation:
The derivative of an addition/subtraction of terms is the addition/subtraction of the derivatives of these terms.
The derivative of a constant is 0.
The derivative of 
is 
. The derivative of 
is 
, for example.
The derivative of the ln function:
If we have:
The derivative is
In this problem, we have that:
So 
and 
So the derivative to this function is
No.
40*500= 20,000
40*600= 24,000
Answer:
(77,24)
Step-by-step explanation:
If you have any questions about the way I solved it, don't hesitate to ask
Answer:
1/2, 4/5, 9/10
Step-by-step explanation:
100% of the price = $400
x % of the price = $320
we need to find x
using a proportion
100 : 400 = x : 320
100 * 320 = 400 * x
32000 = 400x
x = 32000 / 400
x = 80
That means the new price is 80% of the previous price.
100% - 80% = 20%
and based on this we can make a conclusion that the discount was 20%
I hope it is clear to you, feel free to ask anything about it :)
