Use the rules for multiplication by powers of 10 to calculate 3 × 100

more explaining on the multiplication by powers of 10, examples would be great!

What is the value of r of the geometric series?

In the diagram, gef and hef are congruent. what is the value of x

When you dilate a figure with a scale factor of 1/2, what will the dilated figure look like?                                                                                           a: the dilated figure will have side lengths that are half the length of the original side lengths.                                                                          b: the angles in the dilated figure will be half the measure of the original figure.                                                                                c: the dilated figure will have side lengths twice the length of the original.