For the curve r(t), find an equation for the indicated plane at the given value of t.r(t) = (t - 4)i + (ln(sec t) - 1)j + 4k, -?/2 < t < ?/2; normal plane at t = 6?.
A. x = 4 - 6?
B. x = 6? + 4
C. x = -6? - 4
D. x = 6? - 4
Answer: D
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One period of the given function is defined below. Determine whether the function is even, odd, or neither.
A. Odd B. Neither C. Even
Determine the vertex and the x-intercepts. Then sketch the graph.y = x2 + 2x - 8
A. 
Vertex: (1, 9);
x-intercepts: (-2, 0) and (4, 0)
B. 
Vertex: (- 1, - 9);
x-intercepts: (-4, 0) and (2, 0)
C. 
Vertex: (1, - 9);
x-intercepts: (-2, 0) and (4, 0)
D. 
Vertex: (- 1, - 9);
x-intercepts: (4, 0) and (2, 0)
Determine which of the rational functions given below has the following feature(s).The horizontal asymptote is y = 5
A. f(x) = 
B. f(x) = 
C. f(x) = 
D. f(x) = 
Solve the problem.Matt bought 3 pounds of oranges and 2 pounds of apples and paid src="https://sciemce.com/media/4/ppg__gfghf0512192144__f1q41g4.jpg" alt="" style="vertical-align: -15.0px;" />
A. $0.76 per pound
B. $0.79 per pound
C. $0.72 per pound
D. $0.74 per pound
before tax. Andy bought 4 pounds of oranges and 3 pounds of apples and paid 
before tax. Use this information to set up a matrix equation of the form AX = B, which can be solved to determine the price per pound for oranges and apples. Solve this matrix equation to find the price per pound of oranges.Use the fact that for 