Express the number in scientific notation.890,000,000
A. 8.9 × 108
B. 8.9 × 107
C. 89 × 107
D. 8.9 × 109
Answer: A
Mathematics
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Rationalize the denominator and simplify. 
A. 
B. 
C. 
D. 
Mathematics
Write a general formula to describe the variation.The volume V of a right circular cone varies directly with the square of its base radius r and its height h. The constant of proportionality is 
?.
A. V = 
r2h
B. V = 
?r2h2
C. V = 
?r2h
D. V = 
?rh
Mathematics
Provide an appropriate response.Fill in the blank with "always greater than," "sometimes greater than," "always less than," or "cannot be determined," whichever response is correct. When dividing a positive fraction by 
, the answer is 
the fraction.
A. always greater than B. always less than C. sometimes greater than D. cannot be determined
Mathematics
Solve.m - 1 ? -5
A. m ? 4 B. m ? -4 C. m ? -6 D. m ? 6
Mathematics