Solve the problem. Round to the nearest hundredth, if necessary.The average weekly income of teachers in one school district is $840 with a standard deviation of 
Find the percentage of teachers earning more than $960 a week?
A. 1.09%
B. 13.79%
C. 84.13%
D. 86.21%
Answer: B
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Describe the domain of the function of three or more varables.f(x, y, z) = 
A. The set of all points on and outside the ellipsoid 
+ 
+ z2 = 1.
B. The set of all points on and inside the ellipsoid 
+ 
+ z2 = 1.
C. The set of all points on and outside the ellipsoid 
+ 
+ z2 = 1.
D. The set of all points on and inside the ellipsoid 
+ 
+ z2 = 1.
Add or subtract as indicated. Simplify, if necessary.- 
+ 
A. - 
B. 
C. 
D. - 
Find the indicated premium. Round to the nearest cent. 
Find the total premium paid over 20 years for a universal life policy with a face value of $90,000. Assume the policy is taken out by a 25-year-old man.
A. $9198.00 B. $4644.00 C. $9108.00 D. $8640.00
Write as a percent. 0.088
A. 0.0088% B. 0.088% C. 88% D. 8.8%