Write the number of inches indicated by the arrow as an improper fraction.
A. 
B. 
C. 
D. 
Answer: A
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Write the digit for the given place value in the whole number.32,721ten thousandsones
A. ten thousands 2 ones 1 B. ten thousands 3 ones 2 C. ten thousands 3 ones 1 D. ten thousands 2 ones 7
Solve the problem.A certain electronic air cleaner is capable of filtering x liters of air per second and the percentage of the contaminants that are removed from the air may be calculated by 
where 
Graph f in [0,85,5] by 
Then, use the intersection-of-graphs method to estimate the x-values where 75% to 95% of the pollutants are removed.
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A. 75% to 95% are removed when
about 36 to 47 liters of air are
filtered.
B. 75% to 95% are removed when
about 25 to 33 liters of air are
filtered.
C. 75% to 95% are removed when
about 45 to 56 liters of air are
filtered.
D. 75% to 95% are removed when
about 27 to 36 liters of air are
filtered.
Determine the accuracy of the measurement; that is, give the number of significant digits for the measurement.0.052000 A
A. 5 B. 2 C. 7 D. 3 E. 6
Find the exact value of 
without using a calculator.
A. 
B. 
C. ?
D. 
E. -1