Assuming all variables are positive, use properties of logarithms to write the expression as a sum or difference of logarithms or multiples of logarithms.log89x
A. log8 9 + log8 x
B. log4 9 - log4 x
C. log4 9 + log4 x
D. log8 9 - log8 x
Answer: A
Mathematics
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250 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with mean ? = 75 and standard deviation ? = 10.The average score on the exam was approximately
A. 85. B. 10. C. 95. D. 75. E. none of these
Mathematics
Without using a calculator, give the exact trigonometric function value with rational denominator.sin 30°
A. 
B. 
C. 
D. 
Mathematics
Solve the proportion and check. 
= 
A. 18
B. 18
C. 18
D. 18
Mathematics
Add or subtract.8.9 + 87.71 + 80.8
A. 177.42 B. 177.41 C. 178.41 D. 177.51
Mathematics