Find the point-slope equation for the line with the given properties.Slope = - 
; line passes through the point (4, 5)
A. y - 5 = - 
(x - 4)
B. y - 5 = - 
(x + 4)
C. y - 5 = 
(x - 4)
D. y + 5 = - 
(x + 4)
Answer: A
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Solve the problem.The pH of the blood of a small mammal usually falls between 7.28 and 7.49. Find the corresponding bounds of [H3O+].
A. 10-7.49 and 10-7.28 B. e-7.49 and e-7.28 C. log10 7.28 and log10 7.49 D. 107.49 and 107.28
Solve. Verify your solution.8 - 
= 0
A. x = 8
B. x = 64
C. No solution
D. x = 
Provide an appropriate response.If an equation indicates addition in its presentation, in order to solve for the unknown you must:
A. add B. divide C. multiply D. subtract
The amount of nitrogen dioxide, a brown gas that impairs breathing, present in the atmosphere on a certain May day in a city has been approximated by
?
?
where A(t) is measured in pollutant standard index (PSI), and ?t is measured in hours, with 
corresponding to 4 a.m. Use the trapezoidal rule with 
to estimate the average PSI between 4 a.m. and noon. Please round the answer to the nearest hundredth. (Hint: 
.)
?
A. 106.95 nitrogen dioxides
B. 108.79 nitrogen dioxides
C. 159.77 nitrogen dioxides
D. 102.79 nitrogen dioxides
E. 129.7 nitrogen dioxides