Simplify the expression. Assume all variables represent nonzero real numbers.(-2t5)(5t2)(-3t7)
A. 30t14
B. 0t14
C. 0t12
D. 30t15
Answer: A
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A company installs 5,000 light bulbs. The lifetimes of the lightbulbs are approximately normally distributed with a mean of 500 hours and a standard deviation of 100 hours. Find the approximate number of bulbs that can be expected to last the indicated amount of time.Less than 500 hours
A. 3,000 B. 2,500 C. 1,000 D. 2,400
Solve the problem.A pendulum traces out a path over the x, y-plane described by 
. Determine the center and the radius of the circle by completing the square. Round each number in your answer to the nearest hundredth.
A. (-41.16, 27.51), r = 82.65 B. (-41.16, 27.51) r = 1366.20 C. (-13.72, 9.17), r = 16.53 D. (13.72, -9.17), r = 273.24
Approximate. Round to the nearest thousandth.
A. 2.651 B. 2.652 C. 3.651 D. 2.007
Simplify the rational expression. If the rational expression cannot be simplified, so state.
A. cannot be simplified
B. 
C. 
D. 