Can someone plz help me like please

Using the side-splitter theorem, daniel wrote a proportion for the segment formed by luke segment de. what is ec?

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)

One positive number is 9 more than twice another. if their product is 95, find the numbers