Question

The surface area S of a single-celled organism may be found by multiplying 4π times the square of the radius r of the cell. Express S as a function of r.

Answer 1

Answer:

$S(r)=4\pi r^2$.

Step-by-step explanation:

It is given that, the surface area S of a single-celled organism may be found by multiplying 4π times the square of the radius r of the cell.  

We need to express S as a function of r.

Let r be the radius of the cell and S(r) be the surface area of single-celled organism when radius is r.

According to the question,

$S(r)=4\pi \times r^2$

$S(r)=4\pi r^2$

Therefore, the required function is $S(r)=4\pi r^2$.