Find a unit normal vector to the surface 
at the point 
.
?
A. 
B. ?
C. ?
D. ?
E. ?
Answer: C
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Solve the formula for the specified variable.A = P(1 + nr); for r
A. r = 
B. r = 
C. r = 
D. r = 
Solve the problem. Round your result to an appropriate number of significant digits.Raul, who is 1.98 m tall, wishes to find the height of a tree. He walks 18.87 m from the base of the tree along the shadow of the tree until his head is in a position where the tip of his shadow exactly overlaps the end of the tree top's shadow. He is now 5.77 m from the end of the shadows. How tall is the tree? Round to the nearest hundredth.
A. 2.85 m B. 0.605 m C. 8.46 m D. 6.48 m
Solve:
ÚÄÄ ÚÄ û-9 ð û9 = a. 3 + j3 b. j6 c. 3 + j3 d. j9 e. -9
Find an equation of the tangent to the curve at the point corresponding to the given value of the parameter.
 FIGURE 1.png)