Simplify the rational expression.
A. 
B. 
C. 
D. 
Answer: D
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Perform the desired operation. Write the answer in the form a + bi.(-2 - 9i)(3 + i)
A. -15 - 29i B. -15 + 25i C. 3 + 25i D. 3 - 29i
Solve the problem.In 1980, there were 125,000 farms in a state. As of 2005, there were 81,000. Find the average rate of change in the number of farms per year.
A. 1760 farms per yr B. 8240 farms per yr C. -1760 farms per yr D. -5760 farms per yr
Determine whether the first number is divisible by the second number.5250; 21
A. Yes B. No
Solve the problem.The function A = A0e-0.00866x models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. If 500 pounds of the material are placed in the vault, how much time will need to pass for only 115 pounds to remain?
A. 170 years B. 180 years C. 340 years D. 175 years