In the equation above c is a constantly . if n =5 , what is the value of c ?

With #! i’ve tried to figure it out but i can’t.

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)

Write the expression in complete factored form. 5n_(c - 3) - n(c - 3) =