Solve the problem.In the consecutive chemical reaction, A1
A2 
A3 where k1 and k2 are rate constants, the amount A2(t) of substance A2 present at any time t is A2(t) = - 2.2
, 
Assuming that time is measured in minutes, determine within the first 60 minutes the intervals in which A2 is increasing and decreasing.
A. A2 is increasing during the first 50.0 minutes and decreasing from 50.0 to 60 minutes.
B. A2 is increasing during the first 38.1 minutes and decreasing from 38.1 to 60 minutes.
C. A2 is increasing during the first 34.7 minutes and decreasing from 34.7 to 60 minutes.
D. A2 is decreasing during the first 34.7 minutes and increasing from 34.7 to 60 minutes.
Answer: C
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A. 
i - 
j + 
k
B. 
i - 
j + 
k
C. - 
j + 
k
D. - 
j + 
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Solve.The seats in the lecture hall are arranged in 16 rows with 9 seats in each row. Find how many seats are in this room.
A. 144 seats B. 153 seats C. 135 seats D. 154 seats
Raise to the power or find the root. Assume that all variables represent positive numbers. Write with only positive exponents.-
A. -x2 B. -x4 C. -2x D. -x3
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