Write the number in scientific notation.Light with a wavelength of 0.0002 meters is in the infrared portion of the electromagnetic spectrum.

A. 2 × 10-3
B. 2 × 104
C. 2 × 10-4
D. 2 × 10-5


Answer: C

Mathematics

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Factor the difference of two squares. Assume that variables represent whole numbers.x2 - 36

A. (x - 6)(x - 6) B. (x + 6)(x - 6) C. (x + 36)(x - 36) D. (x2 + 6)(x2 - 6)

Mathematics

Perform the indicated operation and simplify. Write the answer in the form a + bi.(5 - 8i)2

A. -39 B. 10 - 16i C. -39 - 80i D. 25 + 64i

Mathematics

Solve the equation for all values 0 ? x ? 2?.cos 2x =  - cos 2x

A. No solution
B. x = 0, , ?, 
C. x = 
D. x = 

Mathematics

Find the domain of the composite function f ? g.f(x) = ; g(x) = 

A. {x 
B. {x 
C. {x 
D. {x 

Mathematics