What is cellular respiration and what are the three stages?

Explanation:

Cellular respiration occurs in the cells of all living things, both autotrophs and heterotrophs. All of them burn glucose to form ATP. The reactions of cellular respiration can be grouped into three stages: glycolysis, the Krebs cycle (also called the citric acid cycle), and electron transport.

dx/dt = 12 (in thousands of units /week)

Step-by-step explanation:

We have from problem statement that:

8*p³ + x² = 104    (1)

Where p is price in $, and "x" is the weekly sales in thousands of units

All variables  x  and  p change in relation to time then

Differentiating on both sides of the equation, we get:

24*p²*dp/dt +  2*x*dx/dt = 0      (1)

We need to find dx/dt and we know

p = 20

x = 200

And price is falling at the rate of 0,5 $/week

Then plugging these values in equation (1)

24*p²*dp/dt  = - 2*x*dx/dt

24*(20)²(-0,5) = -400*dx/dt

-4800  = -400*dx/dt

dx/dt = 4800/400

dx/dt = 12 (in thousands of units /week)