Compute the range for the set of data.6, 8, 8, 3, 7, 12, 8, 9, 6
A. 12
B. 7.4
C. 9
D. 15
Answer: C
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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 
Solve the problem.Use the formula P = Iekt. A bacterial culture has an initial population of 10,000. If its population declines to 7000 in 
what will it be at the end of 
A. 3108 B. 6215 C. 1500 D. 7366
Solve the exponential equation and approximate the result, correct to three decimal places.7 ? 2x - 7 = 20
A. 3.301 B. 1.948 C. 0.893 D. 1.249
Solve the problem.pH = -log10[H+] Find the [H+] if the pH = 6.4.
A. 3.98 × 10-6 B. 2.51 × 10-6 C. 3.98 × 10-7 D. 2.51 × 10-7