Students in a math class receive a B if the average of their four test scores is between 75 and 85. Raul scored 71, 82, and 88 on the first three tests. Within what range must his score on the fourth test lie if he is to get a B?
A. At least 59
B. Between 70 and 90
C. Between 75 and 85
D. Between 59 and 99
Answer: D
Mathematics
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A. 190.836 B. 189.836 C. 189.846 D. 189.936
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Solve the equation for all complex solutions, giving exact forms in your solution set.x3 + 27 = 0
A. 
B. 
C. 
D. 
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Suppose that the oxygen level P (for purity) in a body of water t months after an oil spill is given by 
. Find how long it will be before the oxygen level reaches its minimum.
??
A. 
B. 
C. 
D. 
E. none of the above
Mathematics
Perform the indicated operation.(
+ 
)(
- 
)
A. 12 - 8
B. 4
C. 12 - 2
D. 20
Mathematics