Solve the problem.Suppose that during a certain step in a chemical manufacturing process the amount of hydrogen chloride dissolved in a solution, measured in parts per million (ppm), is related to the elapsed time measured from the beginning of the step. Use the following table as a representation of this relationship. What does the ordered pair (12, 28.4) mean in the context of this situation?
A. (12, 28.4) indicates that 12 ppm of hydrogen chloride was dissolved after 28.4 minutes elapsed.
B. (12, 28.4) indicates that 28.4 ppm of hydrogen chloride was dissolved after 12 seconds elapsed.
C. (12, 28.4) indicates that 28.4 ppm of hydrogen chloride was dissolved after 20 minutes elapsed.
D. (12, 28.4) indicates that 28.4 ppm of hydrogen chloride was dissolved after 12 minutes elapsed.
Answer: D
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Insert the correct sign of inequality (> or <) between the given numbers.4.2 -8.4
A. 4.2 < -8.4 B. 4.2 > -8.4
Evaluate the line integral of f(x,y) along the curve C.f(x,y) = 3y2, C: y = e-x, 0 ? x ? 5
A. 1
B. 1[2
- (e- 10 + 1)3/2]
C. 1
D. 
[2
- (e- 10 + 1)3/2]
Translate into an equation and solve.A number times -21 is 6.51.
A. 0.031 B. -14.49 C. 3.1 D. -0.31
Provide an appropriate response.Find the equation of a line passing through the points (2, 4) and (3, 8). Solve for y.
A. y = 
x + 
B. y = 4x - 4
C. y = -4x + 12
D. y = 4x + 4