Evaluate the improper integral.
A. -8
B. 8
C. 0
D. 4
Answer: B
Mathematics
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Solve the initial value problem.Differential Equation: 
= (2 sec 2t tan 2t) i + 
j + t2kInitial Condition: r(0) = 7i + 
j - 5k
A. r(t) = (csc 2t + 6)i + 
j + 
k
B. r(t) = (sec 2t + 6)i - 
j + 
k
C. r(t) = (csc 2t + 6)i + 
j + (t3 - 5)k
D. r(t) = (sec 2t + 6)i + 
j + 
k
Mathematics
Determine the vertex and the x-intercepts. Then sketch the graph.y = x2 - 4
A. 
Vertex: (0, -4); x-intercepts: (-2, 0) and (2, 0)
B. 
Vertex: (0, 4); x-intercepts: none
C. 
Vertex: (0, -4); x-intercepts: none
D. 
Vertex: (-4, 0); x-intercept: (-4, 0)
Mathematics
Convert.7.84 meters to centimeters
A. 0.0784 cm B. 0.784 cm C. 784 cm D. 78.4 cm
Mathematics
Determine if the function is increasing or decreasing over the interval indicated.y = 4x2 ; x > 0
A. Decreasing B. Increasing
Mathematics