Is -6.8 a positive number?

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)

Someone me what is the area of this figure? 18m 18m 8m 16m

The points (1, 7) and (0, 2) fall on a particular line. what is its equation in slope-intercept form?