Use front end rounding to estimate the answer. Then use your estimate to select the correct exact answer.262.291 + 58.63
A. 203.661
B. 320.921
C. 321.921
Answer: B
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Simplify the expression. Write answer with positive exponents. Variables are positive real numbers.[
]1/2
A. xy1/2
B. 
C. xy
D. xy2
Use the given graph to find the values of t that produce the graph in the given quadrant.x = 3 - 
, y = t - 1, -6 ? t ? 6
Quadrant I
A. -3 ? t ? 1 B. 3 ? t ? 6 C. -6 ? t ? -3 D. 1 ? t ? 3
Solve the problem.An athlete uses three different exercise regimens for increasing cardiovascular fitness. An hour of regimen A rates a 3 in effectiveness, an hour of regimen B rates a 4 in effectiveness, and an hour of regimen C rates a 5 in effectiveness. In any given week, the athlete can train at most 4 hours by regimen A. In any given week the combined hours of regimens A and C may not exceed 8. In any given week the combined hours of regimens B and C may not exceed 10. How many hours of each regimen should the athlete perform in a week in order to maximize the increase in fitness?
A. 3 hours of regimen A, 5 hours of regimen B, 5 hours of regimen C B. 4 hours of regimen A, 6 hours of regimen B, 4 hours of regimen C C. 0 hours of regimen A, 2 hours of regimen B, 8 hours of regimen C D. 2 hours of regimen A, 4 hours of regimen B, 12 hours of regimen C
If f(x) = x2 - 9 and g(x) = x2 - 16, find 
g(f(x)).
A. ((x2 - 9)2 - 16)(2x) B. (x2 - 9)2 - 16 C. 4x3 - 50x2 D. 4x3 - 36x