Find the derivative of the function at the given point in the direction of A.
A. - 
B. - 
C. 0
D. 
Answer: B
Mathematics
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Solve the problem.The time T necessary to make an enlargement of a photo negative varies directly as the area A of the enlargement. If 126 seconds are required to make a 3-by-7 enlargement, find the time required for a 
enlargement.
A. 280 sec B. 200 sec C. 320 sec D. 240 sec
Mathematics
For what values of x does the series converge absolutely?
A. -10 < x < -8 B. -10 ? x ? -8 C. -10 ? x < -8 D. -10 < x ? -8
Mathematics
Translate using numbers and symbols.a number plus seven
A. x + 7 B. x × 7 C. 7x D. x - 7
Mathematics
Solve the problem. Write ratios in lowest terms.Tuition at a certain college recently increased from $6000 to $11,000. Find the ratio of the increase in price to the original price.
A. 
B. 
C. 
D. 
Mathematics