Pre-Calc/Chapter 2: Polynomial, Power, and Rational Functions/2.8 Solving Inequalities in One Variable/2.8.3 Applications
Solve the problem.A flare fired from the bottom of a gorge is visible only ...
Solve the problem.
A flare fired from the bottom of a gorge is visible only when the flare is above the rim. If it is fired with an initial velocity of 208 ft/sec, and the gorge is 672 ft deep, during what interval can the flare be seen? ]]>
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1.0000000
0.3333333
0
true
true
abc
Correct
Incorrect
Incorrect
Incorrect
Solve the problem.A retailer knows that n games can be sold in a month if the...
Solve the problem.
A retailer knows that n games can be sold in a month if the price is dollars per game. If he buys each game for $7, and if he wishes to make a profit of at least $600 per month on sales of this game, how many games must he sell each month?]]>
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1.0000000
0.3333333
0
true
true
abc
25 ≤ n ≤ 45
Incorrect
25 ≤ n ≤ 40
Incorrect
40 ≤ n ≤ 50
Correct
40 ≤ n ≤ 90
Incorrect
Solve the problem.If a rocket is propelled upward from ground level, its ...
Solve the problem.
If a rocket is propelled upward from ground level, its height in meters after t seconds is given by During what interval of time will the rocket be higher than 137.2 m?]]>
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1.0000000
0.3333333
0
true
true
abc
Correct
Incorrect
Incorrect
Incorrect
Solve the problem.The cost of producing t units is C = 3t2 + 8t, and the ...
Solve the problem.
The cost of producing t units is C = 3t2 + 8t, and the revenue generated from sales is R = 4t2 + t. Determine the number of units to be sold in order to generate a profit.]]>
1.0000000
0.3333333
0
true
true
abc
Incorrect
Incorrect
Correct
Incorrect
Solve the problem.
The profit made when t units are sold, t > 0, is given by Determine the number of units to be sold in order for P > 0 (a profit is made).]]>
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1.0000000
0.3333333
0
true
true
abc
Incorrect
Correct
t = 33
Incorrect
t = 19 or t = 14
Incorrect
Solve the problem.
The profit made when t units are sold, t > 0, is given by Determine the number of units to be sold in order for P = 0 (the break- even point).]]>
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1.0000000
0.3333333
0
true
true
abc
Incorrect
t = 31
Incorrect
t = 19 or t = 12
Correct
t = -19 or t = -12
Incorrect