Select the right expression for the following sum and prove that your statement is true for all natural numbers n.
?
?
A. ?
B. ?
C. ?
D. ?
E. ?
Answer: D
Mathematics
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Solve the problem.The length of arc s of a curve from x = a to x = b is s = 
The cable of a bridge can be described by the equation 
from 
to 
Find the length of the cable.
A. 3450 ft B. 235 ft C. 310 ft D. 153 ft
Mathematics
Use the rules for exponents to rewrite the expression and then evaluate the new expression. (72)-1
A. 
B. - 
C. -14
D. -49
Mathematics
Find the product of the complex number and its conjugate.6 - 3i
A. 27 B. 36 + 9i C. 45 D. 36 - 9i
Mathematics
Write the ratio in three different ways.the ratio of 0.2 to 50
A. 0.2 to 50, 0.2:50, 
B. 0.2 to 50, 0.2;50, 
C. 50 to 0.2, 50:0.2, 
D. 0.2 of 50, 0.2;50, 
Mathematics