If the dimensions of a figure are doubled, then the area of the figure

Quadrupled

Step-by-step explanation:

Let us consider rectangle be a figure whose dimensions are .

Then, the area of the rectangle will be:

Now, If we double the dimensions of the rectangle that is , then the area of the rectangle will become:

Therefore, if we double the dimensions of the rectangle, the area becomes quadrupled.

Thus, If the dimensions of a figure are doubled, then the area of the figure is Quadrupled.

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)