A standard normal distribution has a mean of _____ and standard deviation of _____.
A. zero, zero
B. zero, one
C. one, one
D. one, zero
Answer: B. zero, one
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Assuming that the equations define x and y implicitly as differentiable functions 
find the slope of the curve 
at the given value of t.2x - t2 - t = 0, 2ty + 6t2 = 6, t = 1
A. - 6 B. 9 C. - 9 D. - 4
Graph the parabola or ellipse. Include the directrix that corresponds to the focus at the origin.r = 
A. 
B. 
C. 
D. 
The augmented matrix is in row-echelon form and represents a system of linear equations. Solve the system using backward substitution.
Write the solution as an ordered pair, if possible.
A. (5, 4) B. No solution C. (6, 6) D. (7, 6)
Find the total amount due on the loan. Round to the nearest cent.Principal = $29,800Rate = 10%Time in months = 20
A. $3,506,467.00 B. $447,000.04 C. $34,766.67 D. $149.00