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  (i) Graph f in [0, 85, 5] by  (ii) Use the intersection-of-graphs method to estimate the x-values where 75% to 90% of the pollutants are removed.

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A.

75% to 90% are removed when
about 46 to 55 liters of air are
filtered.
B.


75% to 90% are removed when
about 38 to 46 liters of air are
filtered.
C.


75% to 90% are removed when
about 25 to 31 liters of air are
filtered.
D.

75% to 90% are removed when
about 31 to 38 liters of air are
filtered.

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Answer: B

Mathematics

The following table shows the temperature F, in degrees Fahrenheit, of an object that has a temperature of K on the Kelvin temperature scale.  K 200 230 260 290 F -99.67 -45.67 8.33 62.33? ? A: Complete a table of changes to show that the data are linear.B:  Find a linear model for the data. Round your answer to two decimal places, if necessary.C:  If the temperature of an object increases by 19 degrees on the Kelvin scale, by how much does its temperature increase on the Fahrenheit scale? Round your answer to two decimal places, if necessary.

What will be an ideal response?

Multiply. 

A. -90.988 B. -94.268 C. 9.0988 D. 90.988 E. -9.0988

Simplify the exponential expression.33 ? 3-4

A. 2187
B. -3
C.
D. - 

Find the power rounded to three significant digits. 

A. 465.484 B. 466.485 C. 465.485 D. 465 E. 466