Can someone help me please

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 tile along the edge of a triangular community pool needs to be replaced? ?

Jim had 15 minutes to do 5 laps around his school what would his time be