Solve the problem.A rectangular steel plate expands as it is heated. Find the rate of change of area with respect to temperature T when the width is 
and the length is 
if 
and 
A. 3.2 x 10-5 cm2/°C
B. 4.2 x 10-5 cm2/°C
C. 1.4 x 10-5 cm2/°C
D. 5 x 10-5 cm2/°C
Answer: D
Mathematics
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Find the surface area of the surface S.S is the portion of the paraboloid z = 81 - x2 - y2 that lies above the ring 1 ? x2 + y2 ? 25 in the 
A. 
[101
- 5
]
B. 
[101
- 5
]
C. 
[101
- 5
]
D. 
[101
- 5
]
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Express as a sum of logarithms.log6 
Z
A. log6 
B. log6 5 - log6 4 + log6 Z
C. log5 Z + log4 Z
D. log6 5Z + log6 4
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The graph of a function is given. Determine whether the function is increasing, decreasing, or constant on the given interval.(-3, 1) 
A. constant B. decreasing C. increasing
Mathematics
Graph the function.y = tan 
A. 
B. 
C. 
D. 
Mathematics