Given: ABCD is a quadrilateral, BC║AD, m∠ A = 90°

Prove: BD^2 − AC^2 = AD^2 − BC^2

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Asequence {an} is defined recursively, with a1 = 1, a2 = 2 and, for n > 2, an = an-1 an-2 . find the term a241. a) 0 b) 1 c) 2 d) 1 2

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)

Sam is picking fruit from a basket that contains many different kinds of fruit. which set of events is independent?