Find the equation of the axis of symmetry of the parabola.f(x) = (x + 1)2 - 5
A. y = 5
B. x = 5
C. x = 1
D. x = -1
Answer: D
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Solve the problem.A 1,000 gallon tank is filled with pure water. A salt solution with a concentration of 11 g/gal flows into the tank at a rate of 8 gal/min. The thoroughly mixed solution is drained from the tank at a rate of 8 gal/min.(a) Write an initial value problem for the mass of the salt.(b) Solve the initial value problem.
A. (a) m'(t) = -0.008m + 88, m(0) = 0 (b) m = -11,000e-0.008t + e-0.008 B. (a) m'(t) = -0.008m + 11,000, m(0) = 1,000 (b) m = 11,000e-0.008t + 88 C. (a) m'(t) = 0.008m - 88, m(0) = 11 (b) m = -88e0.008t + 88 D. (a) m'(t) = -0.008m + 88, m(0) = 0 (b) m = -11,000e-0.008t + 11,000
Solve the problem.Which of the following statements is true about Kruskal's algorithm.
A. It is an efficient algorithm, and it always gives the minimum spanning tree. B. It is an efficient algorithm, but it doesn't always give the minimum spanning tree. C. It is an inefficient algorithm, and it never gives the minimum spanning tree. D. It is an inefficient algorithm, but it always gives the minimum spanning tree. E. none of these
Find the mean. Round to the nearest tenth when necessary.The numbers of points Dee scored playing basketball over the last four games were as follows: 17, 1, 22, 17
A. Mean = 12.8 points B. Mean = 14.3 points C. Mean = 19.3 points D. Mean = 14.8 points
Find an equation of the line that contains the given point and is perpendicular to the given line. If possible, write your equation in slope-intercept form.(4, 4), 
A. y = - 6x + 28
B. y = - 
x - 
C. y = - 6x - 28
D. y = 6x - 28