The present value of a sum of money is the amount that must be invested now, at a given rate of interest, to produce the desired sum at a later date. Find the present value of $1,000 if interest is paid at a rate of 9% per year, compounded semiannually, for 2 years. Round to the nearest cent.
??
A. $700.16
B. $838.56
C. $841.68
D. $960.98
E. $708.43
Answer: B
Mathematics
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Find all the second order partial derivatives of the given function.f(x, y) = xy2 + yex2 + 5
A. 
= 2yex2; 
= 2x; 
= 
= 2y + 2xex2
B. 
= yex2(1 + 2x2); 
= x; 
= 
= y + xex2
C. 
= 2yex2(1 + 2x2); 
= 2x; 
= 
= 2y + 2xex2
D. 
= 2yex2; 
= 2x; 
= 
= 2xex2
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, 0 ? y ? 
, x = 0
A. 4?
B. 8?
C. 
D. 
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Write the expression with only positive exponents and evaluate if possible. Assume all variables represent nonzero real numbers.5x0
A. 0 B. 1 C. x D. 5
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Find the vertical asymptotes of the rational function.g(x) = 
A. none B. x = 8 C. x = 3 D. x = -3
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