Write the system of linear equations as a matrix equation.
What will be an ideal response?
? 
= 
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Find the unit tangent vector T and the principal unit normal vector N. r(t) = (ln(cos t) + 3)i + 6j + (4 + t )k, -?/2 < t < ?/2
A. T = (sin t)i - (cos t)k; N = (cos t)i - (sin t)k; B. T = (-sin t)i + (cos t)k; N = (-cos t)i + (sin t)k C. T = (sin t)i + (cos t)k; N = (cos t)i - (sin t)k D. T = (-sin t)i + (cos t)k; N = (-cos t)i - (sin t)k
A large number of female llama were studied. It was found that this species of llama has a mean gestation period of 350 days with a standard deviation of 11 days. (Gestation period is defined as the time from conception to birth.) Use this to information to solve the problem.
What percent of llamas have a gestation periods between 328 and 372 inches?
A. 99.7% B. 47.5% C. 68% D. 95%
Provide an appropriate response.If f(x, y) = 
, then fx(x, y) =
A. 
B. 
C. 
D. 
E. none of the above
Simplify the expression.(-3.8)2
A. -14.44 B. 14.44 C. 43.32 D. -7.6