The wages of the employees of a company are presented in this histogram. Answer the question.
How many employees earn at least $4 and less than $6 an hour?
A. 10
B. 20
C. 34
D. 22
Answer: B
Mathematics
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Solve the problem.Find the moment of inertia Iz of a tetrahedron of constant density 
bounded by the coordinate planes and the plane 
.
A. 91
B. 
C. 
D. 
Mathematics
a and b represent the two legs of a right triangle, while c represents the hypotenuse. Find the length of the unknown side.a = 12 km, c = 20 km
A. b = 19 km B. b = 20 km C. b = 16 km D. b = 14 km
Mathematics
Express the fraction as the negative of a mixed number or an integer.
A. -10
B. -8
C. -9
D. -9
Mathematics
Expand by minors along the first column.
A. x - 6y + 2 B. x + 6y - 2 C. x - 6y - 2 D. -x - 6y - 2
Mathematics