The base of a 35-foot ladder is being pulled away from a wall at a rate of 12 feet per second. How fast is the top of the ladder sliding down the wall at the instance when the base of the ladder is 21 feet from the wall?
?
A. 
B. 
C. 
D. 
E. 
Answer: A
Mathematics
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Find an antiderivative of the given function.x7 - 
A. 
+ 
B. 
- 
C. 
- 
D. 7x6 + 
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Simplify the power of i.i-26
A. -1 B. -i C. 1 D. i
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Write the number in scientific notation.0.000104
A. 1.04 × 10-4 B. 1.04 × 10-5 C. 1.04 × 10-3 D. 1.04 × 104
Mathematics
Solve the problem.During a five-year period, a company doubles its profits each year. If the profits at the end of the fifth year are $160,000, then what are the profits for each of the first four years?
A. $10,000, $20,000, $40,000, $80,000 B. $11,000, $22,000, $44,000, $86,000 C. $10,000, $20,000, $30,000, $40,000 D. $10,000, $20,000, $40,000, $100,000
Mathematics