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 41% 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. At most 85 ppb
B. between 68 and 85 ppb
C. At most 102 ppb
D. At least 85 ppb
Answer: A
Mathematics
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Provide an appropriate response.Which method of apportionment compares a modified quota to a geometric mean?
A. Hamilton's method B. Jefferson's method C. Hill-Huntington method D. Webster's method
Mathematics
Solve.Given that loga2 = 0.3010 and loga3 = 0.4771, find loga54.
A. 0.4096 B. 1.7323 C. 1.3801 D. 0.4308
Mathematics
Change 123 to base eight. ? __________ eight
Fill in the blank(s) with the appropriate word(s).
Mathematics
Find an expression for the nth term of the arithmetic sequence.-7, -3, 1, 5, 9, . . .
A. an = -4n + 11 B. an = 4n - 11 C. an = -7 + 4n D. an = 4n + 11
Mathematics