Solve the problem.Ozone levels inside a building should not exceed 50 parts per billion (ppb). In a scientific study, an air filter was able to remove 36% of the ozone entering a building. Approximate the range of ozone concentrations in outside air that this filter will reduce to an acceptable level.
A. between 63 and 78 ppb
B. At least 78 ppb
C. At most 94 ppb
D. At most 78 ppb
Answer: D
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Simplify.5
+ 11
A. 16
B. 16
C. 16
D. 6
Solve the problem.A pier 1250 meters long extends at an angle from the shoreline. A surveyor walks to a point 1500 meters down the shoreline from the pier and measures the angle formed by the ends of the pier. If is found to be 53°. What acute angle (correct to the nearest tenth of a degree) does the pier form with the shoreline? Is there more than one possibility? If so, how can we know which is the correct one?
What will be an ideal response?
Solve the equation.0.3x - 0.2(60 + x) = -0.15(60)
A. {20} B. {40} C. {15} D. {30}
Find an equation for the line, in the indicated form, with the given properties. Containing the points (-3, 2) and (-7, 7); general form
A. -5x - 14y = -133 B. 5x + 14y = -133 C. 5x + 4y = -7 D. -5x + 4y = -7