Solve the problem by integration.Under specified conditions, the time t (in min) required to form x grams of a substance during a chemical reaction is given by 
Find the equation relating t and x if x = 0 g when 
A. t = 
ln 
- 
ln 
B. t = 
ln 
+ 
ln 
C. t = 
ln 
- 
ln 
D. t = 
ln 
+ 
ln 
Answer: C
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Convert the given unit of measure to the measure shown.76 milliliters to liters
A. 0.076 liter B. 0.76 liter C. 76,000 liters D. 7600 liter
Match the given equation with one of the graphs.y2 = 3x
A. 
B. 
C. 
D. 
Solve the problem.In an analysis of traffic, a certain city estimates the traffic flow as illustrated in the figure below, where the arrows indicate the flow of traffic. If x1 represents the number of cars traveling from intersection A to intersection B, x2 represents the number of cars traveling from intersection B to intersection C, and so on, we can formulate equations based on the principle that the number of vehicles entering the intersection equals the number leaving it. Formulate an equation for the traffic at each of the four intersections. 
A. x1 - x4 = -450 x1 - x2 = -650 x2 - x3 = -1400 x3 - x4 = 1100 B. x1 - x4 = 450 x1 - x2 = 650 x2 - x3 = 1400 x3 - x4 = 1100 C. x1 - x4 = 450 x1 - x2 = 650 x2 - x3 = 1400 x3 - x4 = -1100 D. x1 - x4 = -650 x1 - x2 = -450 x2 - x3 = 1400 x3 - x4 = -1100
Write parentheses around the two addends that would be easiest to add. Then find the sum.
+ 6 + 
A. 
+ (6 + 
) = 16
B. (
+ 6) + 
= 
C. (
+ 6 + 
) = 
D. 
+ 6 + 
= 