What is it the length of line SA? 1.89ft 2.43ft 3ft 7ft

Empty box + box + empty box fill in the box is equal to 30 how

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)

What term makes it inconsistent y=2x - 4 ?