Let P(x) be the number of prime numbers less than x. Find ?P?(18).
?
A. 
B. ?
C. ?
D. ?
E. ?
Answer: A
Mathematics
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Perform the indicated operation involving cylindrical coordinates.Find the cylindrical coordinates of the point whose rectangular coordinates are (-1, 1, -4).
A. 
B. 
C. 
D. 
Mathematics
Evaluate the expression according to the order of operations.
2
A. 900 B. 50 C. 20 D. 100
Mathematics
Find the indicated sum.-4 + -9 + -14 + -19 + . . . + a50
A. -6318 B. -6450 C. -254 D. -6325
Mathematics
Determine whether the improper integral is convergent or divergent, and calculate its value if it is convergent. 
What will be an ideal response?
Mathematics