The lateral area of a right cone which has a base diameter of four units and a height of 10 units is:

since it has a diameter of 4, then its radius is half that, or 2.

Step-by-step explanation:

The  lateral area of right cone is calculated by the following formula

Where r is the radius of the cone and h is the height

In this case we know that the diameter d of the base is:

So the radius is:

and

So the area is:

step-by-step explanation:

descending order means to order the polynomials from the term with the largest exponent to the term with the smallest exponent.  

therefore, the correct answer is d.