Solve the inequality.
?
?
A. -4 ? x< 8
B. 4 ? x<4
C. -8 ? x< -4
D. -4 < x ? 8
E. -8 ? x< 4
Answer: A
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Graph the parabola and show the focus and directrix.y2 = 36x
A. 
B. 
C. 
D. 
Even with most of the problem missing, it is possible to tell whether a suggested answer is reasonable. Determine whether the answer given is reasonable. If it is unreasonable, move the decimal point or insert a decimal point to make the answer reasonable.How much does Anne's father weigh? 15.2 pounds
A. Unreasonable, should be 152 pounds B. Unreasonable, should be 1.52 pounds C. Reasonable D. Unreasonable, should be 1520 pounds
Find the derivative of the function.s = sin 
- cos 
A. cos 
+ sin 
B. 
cos 
- 
sin 
C. - 
cos 
- 
sin 
D. 
cos 
+ 
sin 
For the curve given by r(t) = (2sint, 5t, 2cost), find the unit normal vector.
What will be an ideal response?