Solve the problem.A student earned scores of 85, 83, 90, 94, 88, and 84 on the first six tests in a biology class. What score is needed on the seventh test to produce an 86 average?
A. 80
B. 78
C. 81
D. 79
Answer: B
Mathematics
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Find the volume of the indicated region.the solid cut from the first octant by the surface 
A. 
B. 
C. 
D. 
Mathematics
Graph.x2 - y2 = 8
A. 
B. 
C. 
D. 
Mathematics
Combine the following, if possible.
+ 
+ 
+ 
A. 
+ 
+ 18
B. 65
+ 18
C. 11
+ 
+ 
D. 11
+ 18
Mathematics
Find the annual double-declining-balance (200% method) rate of depreciation.9 years
A. 22
%
B. 11
%
C. 90%
D. 5
%
Mathematics