HELP PLS
its a math question

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)

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

Yo need asap pls ! markin da brainiest too !