Help please! It’s due at 11pm!

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)

Find the solution(s) to x^2-14+49=0

Which numbers have the same absolute value? choose all that apply. asap will mark at brainliest