Evaluate.0 ? (-19)
A. 0
B. -19
C. -38
D. 19
Answer: A
Mathematics
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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 t = 0 min.
A. t = 
ln 
- 
ln 
B. t = 
ln 
+ 
ln 
C. t = 
ln 
- 
ln 
D. t = 
ln 
+ 
ln 
Mathematics
Solve the problem.The sum of three consecutive odd integers is 207. Find the integers.
A. 69, 71, 73 B. 71, 73, 75 C. 67, 69, 71 D. 62, 63, 64
Mathematics
Find the exact value, given that sin A = -4/5 with A in quadrant IV, 
with B in quadrant III, and 
with C in quadrant II.cos 2C
A. 
B. - 
C. 
D. - 
Mathematics
Write the expression with positive exponents only. Then simplify, if possible.4-2
A. 16
B. 
C. 
D. -16
Mathematics