Evaluate n + 7 for n has a value of 25

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)

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8