Set up the percent proportion, and write "unknown" for the value that is not given. Recall that the percent proportion is 
= 
. Do not try to solve for any unknowns.93% of what is 35?
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Answer: B
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Find the product.(5x - y + 4z)(5x - y - 4z)
A. 25x2 + y2 + 40xz + 8yz - 16z2 B. 25x2 - 10xy + y2 + 40xz + 8yz - 16z2 C. 25x2 + y2 - 16z2 D. 25x2 - 10xy + y2 - 16z2
Use the at least once rule to find the indicated probability.In a blood testing procedure, blood samples from 6 people are combined into one mixture. The mixture will only test negative if all the individual samples are negative. If the probability that an individual sample tests positive is 0.08, what is the probability that the mixture will test positive?
A. 1.00 B. 0.606 C. 0.394 D. 0.000000262
Graph the piecewise-defined function 
if 
if 
, and
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.
What will be an ideal response?
Find all the second partial derivatives.f(x, y) = cos xy2
A. 
= -y4 cos xy2; 
= -2x[2xy2 cos(xy2) + sin(xy2)]; 
= 
= -2y[xy2 cos(xy2) + sin(xy2)]
B. 
= - y2 sin xy2; 
= 2y
; 
= 
= 2
C. 
= - y2 sin xy2; 
= 2[ sin (xy2) - 2y2 cos (xy2)]; 
= 
= 2y [sin (xy2) - y2 cos (xy2)]
D. 
= y2 sin xy2; 
= 2[2y2 cos (xy2) - sin (xy2)]; 
= 
= 2y[y2 cos (xy2) - sin (xy2)]