Find the principal unit normal vector N for the curve r(t).r(t) = (t2 + 3)j + (2t - 8)k
A. N = - 
j + 
k
B. N = 
j - 
k
C. N = - 
j + 
k
D. N = 
j - 
k
Answer: B
Mathematics
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Provide an appropriate response.Solve the following system of equations: x - 2y = 4 2x - 4y = 5
Fill in the blank(s) with the appropriate word(s).
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Solve the problem.Find an equation for the level curve of the function f(x, y) = 
that passes through the point 
.
A. 
= 
B. x = 2y
C. 
? 
D. 
= 2
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Solve.If 2 sandwich rolls cost $0.56, how much will 12 rolls cost?
A. $1.12 B. $4.36 C. $3.36 D. $3.12
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Solve the right triangle using the information given. Round answers to two decimal places, if necessary. 
b = 4, c = 10; Find a, B, and A.
A. a = 9.17 B = 23.58° A = 66.42° B. a = 10.77 B = 24.58° A = 65.42° C. a = 10.77 B = 23.58° A = 66.42° D. a = 9.17 B = 66.42° A = 23.58°
Mathematics