Okay pls answer marking people:)

Which term best describes the association between variables a and b

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 number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2