?Determine the open intervals on which the graph of 
is concave downward or concave upward.
?
A. ?concave downward on 
B. ?concave downward on 
; concave upward on 
C. ?concave upward on 
; concave downward on 
D. ??concave downward on 
; ?concave upward on 
E. ?concave upward on 
; concave downward on 
Answer: E
Mathematics
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B. y = 3
x - 18
C. y = 18x + 3
D. y = 18x - 9
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cosh 2x from x=0 to x = ln 
.
A. 
B. 
C. 6
D. 
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A. 
B. 
C. 1
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Express the percentage as a decimal.0.0078%
A. 0.0078 B. 0.078 C. 0.000078 D. 0.00078 E. 7.8
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