Evaluate using any method.
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Solve the problem.For what value of r does the infinite series 1 + 7r + r2 + 7r3 + r4 + 7r5 + r6 + ... converge?
A. |r| < 7
B. |r| < 
C. |r| < 
D. |r| < 1
The amount M of mercury, in milligrams per deciliter, in the blood of a man eating contaminated food is given by 
, wheret is the time in months since observation began. What is the limiting value of mercury in the bloodstream?
A. About 0.88 milligrams per deciliter B. About 1.76 milligrams per deciliter C. About 0.89 milligrams per deciliter D. About 2.08 milligrams per deciliter
Multiply, and then simplify if possible. Assume all variables represent positive real numbers.(11
+ 5)(
- 5)
A. 11x
- 110
- 25
B. 11x - 110
- 25
C. 11x - 25
D. 11x
- 55
+ 5
- 25
Two dice are thrown. Determine the number of ways the indicated score can be obtained.Less than 4
A. 4 B. 6 C. 2 D. 3