Find the second-order partial derivative.Find fyy when f(x,y) = 8x3y - 7y2 + 2x.
A. 24x2
B. -14
C. 48xy
D. -28
Answer: B
Mathematics
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Answer the question.How many people must be in a room to be sure that at least three were born in the same month of the year?
A. 15 people B. 13 people C. 27 people D. 25 people
Mathematics
Solve. A lamp shade has the geometric form shown below. The total surface area of a lamp shade with slant height s and top and bottom base radii of r2 and r1, respectively, is given by the expression 
Factor this expression. 
A. ?(r1 + r2)(r1 + r2 + sr1r2)
B. ?r1(r1 + 
+ sr1 + sr2)
C. ?(r12 + r22 + sr1 + sr2)
D. ?(r1 + r2)(r1 + r2 + s)
Mathematics
Solve the given equation by completing the square.a2 + 10a + 9 = 0
A. 
B. 
C. 
D. 
Mathematics
In code 8C02X6K the value of K represents ____
Mathematics