Evaluate dz.z = x3 - 8xy2 + 9y; x = -1, y = -3, dx = -0.02, dy = 0.01
A. -1.41
B. 1.95
C. 0.90
D. 0.99
Answer: D
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Find the median for the given sample data.A store manager kept track of the number of newspapers sold each week over a seven-week period. The results are shown below.70, 22, 216, 130, 273, 242, 238Find the median number of newspapers sold.
A. 238 newspapers B. 216 newspapers C. 170 newspapers D. 130 newspapers
Solve.A motorcycle traveling at 70 miles per hour overtakes a car traveling at 30 miles per hour that had a three-hour head start. How far from the starting point are the two vehicles?
A. 2
miles
B. 5
miles
C. 63 miles
D. 157
miles
Find all fixed points for the function by setting the function equal to x and solving the resulting equation for x.f(x) = x2 - 6x + 10
A. -7, -7 B. 5, -2 C. 5, 2 D. 4, 1
Solve the problem.A rectangular board is 13 by 16. The foci of an ellipse are located to produce the largest area. A string is connected to the foci and pulled taut by a pencil in order to draw the ellipse. Find the length of the string.
A. 32 B. 16 C. 13 D. 26