Answer:

Step-by-step explanation:
The given equation is 
Differentiate both sides with respect to x

Take y and 1 to other sides of the equation

Factor out dy/dx from the left hand side of the equation

Divide both sides by (x+1)

290 mph , its going half the speed as before. Hope this helps.
Answer:
D
Step-by-step explanation:
104/16=6.5
6.5 rounds up to 7