Find (fog)(9) when f(x) = - 3x-8 and g(x) = - 5x2 - 7x+2. A. 1,390
B. 422
C. -5,878
D. 310

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)

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.

Explain how to convert measurements in the metric system