Evaluate.xlogx 7
A. x
B. 7logx 7
C. 1
D. 7
Answer: D
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Graph the pair of parametric equations with the aid of a graphing calculator.x = cos 5t, y = sin 2t, 0 ? t ? 2?
A. 
B. 
C. 
D. 
Express the number in decimal notation.8.1 × 105
A. 81,000 B. 8,100,000 C. 405 D. 810,000
Answer the question or complete the sentence to make a true statement.According to the rules for the order of operations, what should be the first step when simplifying the expression [12 + (-1 + 5)] + (-9)?
A. Find the sum of 5 and -9 B. Find the sum of 12 and -9 C. Find the sum of -1 and 5 D. Find the sum of 12 and -1
Solve.Neglecting air resistance, the distance h traveled by a free-falling object in time t is given by the formula 
Use this formula to find the time of free fall for a parachutist who falls 3689 feet before opening her parachute. Round your answer to the nearest tenth of a second.
A. 3.8 sec B. 115.3 sec C. 242.9 sec D. 15.2 sec