Provide an appropriate response.
- 
=
A. 
B. 
C. 
D. 
E. 
Answer: E
Mathematics
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Find all real numbers in the interval [0, 2?) that satisfy the equation.cos2x + 2 cos x + 1 = 0
A. 
B. 
C. 
D. 
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Write the number in standard form.Light with a wavelength of 4 × 10-4 meters is in the infrared portion of the electromagnetic spectrum.
A. 0.004 B. 0.0004 C. 0.00004 D. 40,000
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Find the exact value of the expression or state that it does not exist.cos
A. 0
B. 
C. 
D. 1
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Find the solution to the quadratic equation, if they exist.
(R+ 3)²= 64
Mathematics