Solve the inequality and graph. Express your answer in interval notation.-4(-2 - x) < 6x + 19 - 11 - 2x
A. (-?, 8)
B. ?
C. (-?, 0)
D. (-?, ?)
Answer: B
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For the smooth curve r(t), find the parametric equations for the line that is tangent to r at the given parameter value 
r(t) = (5 tan t)i - (3 sin t)j + (4 cos2 t)k ; t0 = 
A. x = 5 + 10t, y = -
+ 
t, z = 2 + 4t
B. x = 5 + 10t, y = -
- 
t, z = 2 - 4t
C. x = 5 + 10t, y = -
- 
t, z = 4 - 4t
D. x = 10 + 5t, y = -
- 
t, z= -4 + 2t
The magnitude M of a star is related to the relative intensity I of light reaching Earth from the star. The relationship is
.
A: Star A has a relative intensity 8.77 times that of star B. How do their magnitudes compare?B: Make a graph of M versus I. Include relative intensities up to 100.C: If the magnitude of a star is 3, what is the relative intensity of light reaching Earth from the star?
?
Round your answers to two decimal places if necessary.
?
What will be an ideal response?
Solve the problem.A sweater costs $73.68. If the sales tax rate is 5.2%, how much tax is charged? Round your answer to the nearest cent.
A. $4.60 B. $3.83 C. $38.41 D. $4.33
Decide whether the proportion is true or false.
= 
A. True B. False