Answer:
& 
Step-by-step explanation:
I'm sure you are familiar with the product rule,
If y = u*v => dy/dx = u * dv/dx + v * dy/dx <----- product rule
In this case:

Now remember the sum rule:

For this second bit we apply the chain rule:

If we substitute these values back into the expression...
...we get the following:

The rest is just pure simplification:

Now let's equate this to equal 8 for the second bit and solve for x:

2/5 X 100 = 200/5= 40 percent
Answer:
$2.50
Step-by-step explanation:
Answer:
ok the anser is 39
Step-by-step explanation:
ypu do bacic equagens