Find the sum, if it exists.-7 - 
- 
- 
+ . . .
A. - 63
B. - 70
C. 70
D. Does not exist
Answer: D
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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. 
Solve the problem.A sequence of rational numbers {rn} is defined by r1 = 
, and if 
then 
Find
Hint: Compute the square of several terms of the sequence on a calculator.
A. 2
B. 
C. 
D. 
Divide using distribution.
A. 2x6 + 7x3 B. 9x11 C. 2x6 + 14x5 D. 4x8 + 7x3
Solve the problem.Suppose y = mx + b is a mathematical model for actual time as a function of estimated time, where y represents actual time and x represents estimated time and m and b are constants. If m = 2.2 and b = -3.9, find y when x is 30 min.
A. 21.42 min B. 69.9 min C. 62.1 min D. 38.58 min