Find the angle between the given vectors to the nearest tenth of a degree.a = 
and b = 
A. -3.5°
B. 23.0°
C. 6.5°
D. 13.0°
Answer: D
Mathematics
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Simplify the given expression. Expansion of any term is not necessary; proper recognition of the form of the expression leads to the proper result.1 - 2 sin2 2x
A. 
sin 16x
B. cos 8x
C. cos 4x
D. 2 sin 4x
Mathematics
Provide an appropriate response.Write in scientific notation: 3,820,000
What will be an ideal response?
Mathematics
Find the prime factorization of the number. Write any repeated factors using exponents.175
A. 25 ? 5 B. 72 C. 52 ? 7 D. 25 ? 7
Mathematics
Solve and graph.f + 11 < 2
A. f ? -9
B. f ? -9 
C. f < -9 
D. f > -9 
Mathematics