Evaluate the function.Find f(4, 7) when f(x, y) = e5yln x.
A. 2.20e+15
B. 2.60e+15
C. 1.14e+16
D. 944,087,874.53
Answer: A
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Identify the quadric surface by name. Find and describe the xy-, xz-, and yz-traces, when they exist.-9x2 - 9y2 + z2 = 9
A. Hyperboloid of two sheets; xy-trace: -9x2 - 9y2 = 9 (circle); xz-trace: z2 - 9x2 = 9 (hyperbola); yz-trace: z2 - 9y2 = 9 (hyperbola) B. Ellipsoid; xy-trace: -9x2 - 9y2 = 9 (circle); xz-trace: z2 - 9x2 = 9 (ellipse); yz-trace: z2 - 9y2 = 9 (ellipse) C. Hyperboloid of two sheets; xz-trace: z2 - 9x2 = 9 (hyperbola); yz-trace: z2 - 9y2 = 9 (hyperbola) D. Hyperboloid of one sheet; xy-trace: -9x2 - 9y2 = 9 (circle); xz-trace: z2 - 9x2 = 9 (hyperbola); yz-trace: z2 - 9y2 = 9 (hyperbola)
True or false?Given that Sue's weight increased from 120 lb to 132 lb and that Mark's weight increased from 150 lb to 165 lb, we can say that in absolute terms, Mark's weight increased more, but that in relative terms, Sue's weight increased more.
A. True B. False
Solve the problem.5 + 5 × 3 + 5 × 32 + 5 × 33 + . . . + 5 × 378 =
A. 5 × (378 - 1) B. 2.5 × (378 - 1) C. 2.5 × (379 - 1) D. 5 × (379 - 1) E. none of these
Solve. Simplify the answer.Brian was training to run a marathon. During the three-day period before the race he decided that he would train for a total of 10 hours. If he trained for 3
hours on the first day and 1
hours on the second day, how many hours would he need to train on the third day?
A. 4
hr
B. 4
hr
C. 4
hr
D. 5
hr