Find the exact value of the expression.sin 185° cos 65° - cos 185° sin 65°
A. 
B. - 
C. - 
D. 
Answer: D
Mathematics
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Solve the problem.Suppose that R ={(x, y): 0 ? x ? 4, 0 ? y ? 4}, and P is the partition of R into four equal squares by the lines x =2 and y = 2. 
approximate 
by calculatiang the Riemann sum 
, assuming that 
are the centers of the four squares.
A. 96 B. 48 C. 384 D. 192
Mathematics
Solve the problem.Jim has gotten scores of 61 and 82 on his first two tests. What score must he get on his third test to keep an average of 80 or greater?
A. At least 97 B. At least 96 C. At least 74.3 D. At least 71.5
Mathematics
Construct a truth table to decide if the two statements are equivalent.~p ? ~q; ~(p ? q)
A. True B. False
Mathematics
If 
, find 
and 
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?
A. 
, 
B. 
, 
C. 
, 
D. 
, 
E. 
, 
Mathematics