Decide whether or not the events are commutative.Recording a check or a deposit in your check book if both are made on the same day.
A. Yes
B. No
Answer: A
Mathematics
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Solve the equation.
(r + 6) = 
(r + 8)
A. 1 B. 2 C. -2 D. -1
Mathematics
Round the whole number to the given place value.A publishing company sold 26,267,591 books. Round the number of books sold to the nearest ten-million.
A. 30,000,000 B. 26,000,000 C. 26,270,000 D. 20,000,000
Mathematics
Subtract and simplify.
- 
A. 
B. 
C. 
D. 
Mathematics
Find the zeros of the function in the interval [-2?, 2?].f(x) = 3 cos x
A. 0, ±?, ±2?
B. 0, ±
, ±
C. ±
, ±?, ± 
, ±2?
D. ±
, ±
Mathematics