A cone-shaped paper drinking cup is to be made to hold 33 cm3 of water. Find the height and radius of the cup that will use the smallest amount of paper. (Round your answers to two decimal places.) height cm radius cm

The height and the radius of the cylinder are 3.67 centimeters and 5.19 centimeters, respectively.

Step-by-step explanation:

The volume () and the surface area () of the cone, measured in cubic centimeters and square centimeters, respectively, are modelled after these formulas:

Volume

Surface area

Where:

- Height of the cylinder, measured in centimeters.

- Radius of the base of the cylinder, measured in centimeters.

The volume of the paper drinking cup is known and first and second derivatives of the surface area functions must be found to determine the critical values such that surface area is an absolute minimum. The height as a function of volume and radius of the cylinder is:

Now, the surface area function is expanded and simplified:

If , then:

The first and second derivatives of this function are require to determine the critical values that follow to a minimum amount of paper:

First derivative

Second derivative

Let equalize the first derivative to zero and solve the resultant expression:

Now, the second derivative is evaluated at the critical point:

According to the Second Derivative Test, this critical value leads to an absolute since its second derivative is positive.

The radius of the cylinder is: ( and )

The height and the radius of the cylinder are 3.672 centimeters and 5.192 centimeters, respectively.

the correct answer to your question is a. 4^4

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the functions have the same rate of change i think. i narrowed it down to this answer and "the rate of change of tour 1 is greater" but i got it wrong using that answer so im assuming its the answer above. (this is a question i also answered from the iready site if anyone needs a reference)