questions in image

Question

TA = _________

Think about what adjustment you need to make to the formula to solve for the Surface Area of this Polyhedron

Answer 1

To find the volume of a sphere you need to apply this formula:

4* pi * r^3

________

3

since the image shows half of the sphere you need to divide by 2.

The radius is given.

r=11

Then plug in the radius to the equation.

4* pi* 11^3

________

3

The surface area for the whole sphere is

5572.453333

Now you have to divide this number by 2.

5572.453333/2=2,786.2

You round the number to the nearest tenth spot.

Solution is 2,786.2.

ANS: 2,786.2

Answer 2

That is a hemisphere, which is half of a sphere.

The surface area of a whole sphere would be 4 * PI * radius **2, so the surface area of a hemisphere would be half of that.