Find the sum Sn of the first n terms of the geometric sequence.9, 
, 
, 
, . . . ; n = 7
A. 9.999999
B. 9.909099
C. 9.099999
D. 0.999999
Answer: A
Mathematics
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Find the sum of the geometric series.
A. 248 B. 24 C. -1640 D. -5140
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Simplify the exponential expression.(x-3)-3
A. -x6
B. x9
C. 
D. 
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?Medication. The number of milligrams x of a medication in the bloodstream t hours after a dose is taken can be modeled by 
. Find the t-value at which x is maximum. Round your answer to two decimal places.
?
A. ?0 hours B. ?2.83 hours C. ?707.11 hours D. ?4.83 hours E. ?6.91 hours
Mathematics
Simplify.8
A. 24p2q3
B. 8q
C. 24
D. 24p2q
Mathematics