Find the derivative.r = 
- 
A. 
- 
B. 
- 
C. - 
+ 
D. - 
+ 
Answer: D
Mathematics
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The solution for ?t of the equation
?
is:
?
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Kate's kite descends along the curve of y = -2x2 + 20. What is the angle of the descent (with the vertical) when 
A. 83.5° B. 81.2° C. 6.5° D. 4.5°
Mathematics
The point P(x, y) on the unit circle that corresponds to a real number t is given. Find the values of the indicated trigonometric function at t.
?Find cos t.
A. 
B. - 
C. 
D. - 
Mathematics
Factor the trinomial.27 + 6x - x2
A. (9 - x)(3 - x) B. (9 + x)(3 - x) C. (9 - x)(3 + x) D. (x + 9)(x - 3)
Mathematics