Can someone help me please

In the diagram of circle a what is m

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)

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base