Answer the given question.Where are all points whose second coordinate is negative?
A. In first or second quadrant
B. In second or third quadrant
C. In first or fourth quadrant
D. In third or fourth quadrant
Answer: D
Mathematics
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Solve the initial value problem.Differential Equation: 
= 8t2i - tj Initial Conditions: 
= -7i, r(0) = 9i - 4k
A. r(t) = 
i - 
j - 4k
B. r(t) = 
i - 
j - 4k
C. r(t) = 
i + 
j - 4k
D. r(t) = 
i - 
j - 4k
Mathematics
Solve the problem.The index of refraction for air, Ia, is 1.0003.The index of refraction for water, Iw, is 1.3.If 
= 
, and A = 31.5°, find W to the nearest unit.
A. 24° B. 21° C. 22° D. 23°
Mathematics
Simplify. Combine like terms if possible.-8w + 8w
A. 0 B. -64w2 C. -16w2 D. -16w
Mathematics
Provide an appropriate response.Evaluate 42 × (9 - 4) × 4 following the order of operations without using a calculator.
A. 128 B. 320 C. 56 D. 160
Mathematics