Write an equivalent numerical expression and evaluate.8 added to the sum of -15 and 12
A. 8 + [(-15) + 12]; 5
B. 8 + 12 - 15; 19
C. -8 - 15 - 12; -35
D. 8 + 15 + 12; 35
Answer: A
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The resident population of Oklahoma in 1990 was 3.14 million. From 1990 to 2000 the average rate of change in population was 0.21 million people per year. Use these facts to estimate the Oklahoma resident population in 1992. ?
A. 3.56 million B. 3.46 million C. 3.35 million D. none of the above
Find the unit tangent vector of the given curve.r(t) = (4t cos t - 4 sin t)j + (4t sin t + 4 cos t)k
A. T = - 
(sin t)j + 
(cos t)k
B. T = (4 cos t)j - (4 sin t)k
C. T = (-4 sin t)j + (4 cos t)k
D. T = (-sin t)j + (cos t)k
Solve the problem.Find a curve through the point (-6, 1) whose length integral, 1 ? y ? 2, is L = 
A. x = 
B. x = -6
C. x = 
D. x = -6y5/2
Provide an appropriate response.Perform the indicated operation. Express as a power of 10. 105 
Fill in the blank(s) with the appropriate word(s).