Simplify the expression using order of operations.
÷ 
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Find the unit tangent vector of the given curve.r(t) = 
(1 + t)3/2i + 
(1 - t)3/2j + 
tk
A. T(t) = 
i + 
j + 
k
B. T(t) = 
i - 
j + 
k
C. T(t) = 
i - 
j + 
k
D. T(t) = 
i - 
j + 
k
Mathematics
Evaluate.
2
A. 
B. 
C. 
D. 
Mathematics
Solve.The student population of a small school has been increasing as shown in the following table.
Determine the linear, quadratic, or cubic function that best fits the data.
A. f(x) = 5x - 93.33 B. f(x) = x3 - 0.1x2 - 10x + 440 C. f(x) = 0.002x3 - 0.44x2 + 28.19x - 427.30 D. f(x) = 0.1x2 - 10x + 440
Mathematics
Evaluate the expression using the given values.4x + 9y + 7; x = 2, y = 9
A. 92 B. 96 C. 24 D. 61
Mathematics