Identify the given number as "Rational", "Irrational", or "Not a real number". If the number is rational, give its exact value. If the number is irrational, give a decimal approximation to the nearest thousandth.- 
A. Irrational, -72.000
B. Rational, -12
C. Irrational, -12.000
D. Not a real number
Answer: B
Mathematics
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Use set notation to list all the elements of the set.The letters needed to spell these words:tear, rate, rat, tea
A. {r,a,t} B. {t,t,a,a,r,r,e} C. {a,e,r,t} D. {t,t,t,t,r,r,r,a,a,a,a,e,e,e}
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Solve the problem.If sin A = - 
and 
, where 
and 
, then find sin(A - B).
A. 
B. 
C. 
D. - 
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Solve the problem.A signal is made by placing 3 flags, one above the other, on a flag pole. If there are 8 different flags available, how many possible signals can be flown?
A. 512 B. 24 C. 336 D. 56
Mathematics
Find the second-order partial derivatives of the function.
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Mathematics