Find an explicit formula for the geometric sequence -25, -50, -100, 200, . Note: the first term should be d(1).
d(n)
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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)

The only way to identify an intercept is as an ordered pair. true false

How are algebraic expressions evaluated using substitution?