Write the mixed number as an improper fraction.6
A. 
B. 
C. 
D. 
Answer: C
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Simplify. Assume that no radicands were formed by raising negative quantities to even powers.
A. 
B. - 
C. 
D. 
Simplify by combining like terms.7z - z
A. 6z B. 7z - 1 C. 6z2 D. -7z2
Find the expected value.Mr. Cameron is sponsoring an summer concert. He estimates that he will make $300,000 if it does not rain and make $60,000 if it does rain. The weather bureau predicts the chance of rain is 0.34 for the day of the concert. What are Mr. Cameron's expected concert earning?
A. $300,000 B. $360,000 C. $60,000 D. $218,400
Solve the problem.A certain radioactive isotope has a half-life of approximately 1600 years. How many years to the nearest year would be required for a given amount of this isotope to decay to 65% of that amount? Round to the nearest year.
A. 2423 yr B. 929 yr C. 994 yr D. 560 yr