Evaluate the expression.(-4)-1
A. -4
B. - 
C. 
D. 4
Answer: B
Mathematics
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Use a negative-angle identity to write an equivalent trigonometric expression involving a positive angle.csc 
A. csc 
B. -csc 
C. 1 - csc 
D. sec 
Mathematics
Evaluate the double integral
?
?
for the given function f(x, y) and the region R.
?
f(x, y) = 4x + 2y; R is bounded by x = 0, x = 4, y = 0 and y = x.
?
A. 
B. 
C. 
D. 
Mathematics
Write the number in scientific notation.An music album sells 575,000 copies.
A. 5.75 × 103 B. 5.75 × 10-4 C. 5.75 × 105 D. 5.75 × 104
Mathematics
?For the given probability density function, find Var(X). Round your answer to three decimal places.
?
?
?
A. ?12 B. ?6.4 C. ?9 D. ?5.4 E. ?28.8
Mathematics