Find the sum Sn of the first n terms of the geometric sequence.8, 
, 
, 
, . . . ; n = 7
A. 8.808088
B. 8.088888
C. 8.888888
D. 0.888888
Answer: C
Mathematics
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Find the inverse of the function.f(x) = (x - 5)2, x ? 5
A. Not a one-to-one function
B. f-1(x) = 
, x ? 5
C. f-1(x) = 
+ 5, x ? 0
D. f-1(x) = -
+ 5, x ? 0
Mathematics
Evaluate the integral using the given substitution.
dx , u = x5 - 1
A. 
x20 - 1 + C
B. 
(x5 - 1)4 + C
C. 
(x5 - 1)4 + C
D. 
(x5 - 1)2 + C
Mathematics
Solve the problem.A construction crane lifts a bucket of sand originally weighing 
at a constant rate. Sand is lost from the bucket at a constant rate of
. How much work is done in lifting the sand 
? (Neglect the weight of the bucket.)
A. 11,200 ft ? lb B. 8000 ft ? lb C. 12,800 ft ? lb D. 9600 ft ? lb
Mathematics
Provide an appropriate response.Solve the differential equation 
= 
.
What will be an ideal response?
Mathematics