Find the standard deviation for each data set. Round to one more place than the data.158, 182, 170, 264, 300, 238, 126, 158, 168
A. 24.5
B. 57.7
C. 54.4
D. 61.7
Answer: B
Mathematics
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Find the limit.
A. 9
B. 
C. -?
D. 
Mathematics
Find all the second order partial derivatives of the given function.f(x, y) = xye-y2
A. 
= 0; 
= 2xye-y2(2y2 - 3); 
= 
= e-y2(1 - 2y2)
B. 
= ye-y2; 
= 2xye-y2(y2 - 1); 
= 
= e-y2(1 - y2)
C. 
= ye-y2; 
= 2xye-y2(2y2 - 6); 
= 
= e-y2(1 - 2y2)
D. 
= 0 ; 
= 2xye-y2(2y2 - 3); 
= 
= e-y2(1 - y2)
Mathematics
Solve the system by the addition method.x2 + y2 = 145x2 - y2 = -17
A. {(8, 9), (-8, 9), (8, -9), (-8, -9)} B. {(-8, -9), (-9, -8)} C. {(8, 9), (9, 8), (-8, -9), (-9, -8)} D. {(8, -9), (8, 9)}
Mathematics
Factor completely. If the polynomial is prime, state this.20(x - 1)2 + 21y(x - 1) - 5y2
A. (x - 1)(4y + 5)(5y - 1) B. (4x - 4 + 5y)(5x - 5 - y) C. (4x + 5y)(5x - y) D. (4x - 4 - 5y)(5x - 5 + y)
Mathematics