I already did A. but i need help with B AND C! I need help with brainiest

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 letters from the table represent like terms? a and b b and c a and d b and d

Savannah had 40 iris blooms last year this year she had 15% more iris blooms how many more hours blooms did savannah have this year