Find the unit tangent vector T and the principal unit normal vector N. r(t) = 
(1 + t)3/2i + 
(1 - t)3/2j + 
tk
A. T = 
i + 
j + 
k; N = 
i + 
j
B. T = 
i - 
j + 
k; N = 
i + 
j
C. T = 
i - 
j + 
k; N = 
i + 
j
D. T = 
i - 
j + 
k; N = 
i + 
j
Answer: B
You might also like to view...
Find the average value of the function f over the given region.f(x, y) = 
over the square 1 ? x ? 7, 1 ? y ? 7.
A. 
2
B. 
C. 
D. 
2
Provide an appropriate response.Suppose that 4 items are to be selected from N items and that repetitions are not allowed. Which of the following is true?
A. There are 4 times as many permutations as combinations. B. There are 24 times as many permutations as combinations. C. There are 24 times as many combinations as permutations. D. There are 4 times as many combinations as permutations.
Solve the problem.A drapery panel measures 8 feet by 10 feet. How many square feet of material are needed for eight panels?
A. 640 square feet of material are needed for eight panels. B. 560 square feet of material are needed for eight panels. C. 80 square feet of material are needed for eight panels. D. 88 square feet of material are needed for eight panels.
The triangles are similar. Find the angle or side that corresponds to the given angle or side in the other triangle.A
A. C B. T C. S D. R