Use the product rule to simplify the expression. Assume that the variables can be any real number.
A. -6xy
B. 6xy
C. 2xy
D. -6xy
Answer: D
Mathematics
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Solve the problem.Let angle POQ be designated ?. Angles PQR and VRQ are right angles. If ? = 50°, find the length of US accurate to four decimal places. 
A. 1.5557 B. 0.7660 C. 1.1918 D. 0.8391
Mathematics
Use the choices below to fill in the blank. Choices may be used more than once or not at all.
A formula for calculating a permutation of n items taken r at a time is 
.
A. 
B. 
C. 
D. 
Mathematics
Solve the equation. Round decimal answers to the nearest thousandth.4(3x - 2) = 11
A. 1.004 B. 1.243 C. 1.583 D. -0.090
Mathematics
Find the integral.
dx
A. - 
x3 - 4x2 + C
B. 
x3 + C
C. 
x2 + 4x + C
D. 
x3 - 4x2 + C
Mathematics