Solve.A pyramid-shaped piece of metal has a triangular base measuring 5.5 in. on each side. If the height of the piece is 10.2 in., find the weight of fifty of these pyramids. Assume that the metal has a density of 0.208 lb/cu in. (Round to the nearest pound.)
A. 510 lb
B. 458 lb
C. 482 lb
D. 463 lb
Answer: D
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Rewrite the expression without the grouping symbols.a(a - 6)
A. a2 + 6a B. a2 - 6a C. a - 6a D. a2 - 6
Use the graph of the function f(x) to locate the local extrema and identify the intervals where the function is concave up and concave down.
A. Local minimum at x = +1.29,; local maximum at x = -1.29; concave up on (0, ?); concave down on (-?, 0) B. Local minimum at x = +1.29,; local maximum at x = -1.29; concave up on (-?, -1.29) and (1.29, ?); concave down on (-1.29, 1.29) C. Local minimum at x = -1.29,; local maximum at x = +1.29; concave up on (-?, -1.29) and (1.29, ?); concave down on (-1.29, 1.29) D. Local minimum at x = +1.29,; local maximum at x = -1.29; concave down on (0, ?); concave up on (-?, 0)
Solve the percent of change problem.During the first week of December a waiter made $220 in tips. During Christmas week, he made 60% more than this in tips. How much did he make in tips during Christmas week? Round to the nearest cent if necessary.
A. $320.00 B. $352.00 C. $440.00 D. $252.00
Evaluate the expression.
- 7
A. 151 B. 137 C. 5 D. 19