6. you cut a styrofoam ball in half for a project. find the surface area of each half of the styrofoam ball. (round your answer to two decimal places.)

Step-by-step explanation:

You need to use the following formula for calculate the Total surface area of a solid hemisphere:

Where "r" is the radius.

 Since you cut a styrofoam ball in half, the total surface areas are equal.

The exercise gives you the diameter. Observe in the figure that this is:

Since the radius is half the diameter, you know that:

Finally, you can substitute the radius into the formula:

  (Of each half of the styrofoam ball)

the answer will be the last one