Solve. Remember to insert units when writing your answer.A photographer wishes to enlarge a portion of a photograph. The length of the desired portion is 1.6 times the desired portion's width. If the enlargement is to be 9.1 cm wide, what will its length be?
A. 14.56 cm
B. 145.6 cm
C. 1.456 cm
D. 1456 cm
Answer: A
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Provide an appropriate response.Using a calculator, find the value of cos 195°. Round to four significant digits.
A. 0.9756 B. -0.9756 C. -0.9659 D. 0.9659
Find all specified roots.Seventh roots of i.
A. cis 
, cis 
, cis 
, cis 
, cis 
, -i, cis 
B. cis 
, cis 
, cis 
, cis 
, cis 
, i, cis 
C. cis 
, cis 
, cis 
, cis 
, cis 
, -i, cis 
D. cis 
, cis 
, cis 
, cis 
, cis 
, -i, cis 
, i
Use a system of linear equations to solve the exercise.Julie and Eric row their boat (at a constant speed) 21 miles downstream for 3 hours, helped by the current. Rowing at the same rate, the trip back against the current takes 7 hours. Find the rate of the current.
A. 5 mph B. 3 mph C. 2 mph D. 1.5 mph
Provide an appropriate response.Formulate the dual problem for the linear programming problem:Minimize C = 3x1 + x2subject to
A. Maximize P = 3y1 + y2
subject to
B. Maximize P = 60y1 + 40y2
subject to
C.
| Maximize | P = 60y1 + 40y2 |
D.
| Maximize | P = 3y1 + y2 |
