Can someone help me simplify this equation (explain how you did it please)

Select the correct answer from each drop down menu

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area