Solve.
+ 
= 
A. 
B. 
C. 8
D. 
Answer: A
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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 = 2
i + 2
j
D. T = 
i - 
j + 
k; N = 
i + 
j
Solve the logarithmic equation. Be sure to reject any value that is not in the domain of the original logarithmic expressions. Give the exact answer.ln x = 8
A. 
B. 
C. 
D. {ln 8}
Decide whether or not the functions are inverses of each other.f(x) = 
, domain [-1, ?); g(x) = x2 + 1, domain (-?, ?)
A. No B. Yes
Find the indicated probability. Round as indicated.A test consists of 10 true/false questions. To pass the test a student must answer at least 9 questions correctly. If a student guesses on each question, what is the probability that the student will pass the test? Estimate the probability to three decimal places if necessary.
A. 0.011 B. 0.010 C. 0.999 D. 0.001