Perform the indicated operations and simplify.
?
?
A. 
B. 
C. 
D. 
E. 
Answer: A
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Solve the problem.Let T(x, y) be the temperature at a point (x, y) in the plane. Draw the isothermal curves corresponding to T = 
, 
, 
, 0 if 
What will be an ideal response?
Decide whether vertex A of the network is even or odd.
A. Even B. Odd
Solve the problem.A scientist studying ocean tides places an 8 ft high marker in the water at 6 am on a Monday morning. At that time the water is about 5.5 ft high and receding. The scientist observes that the water reaches its lowest level, 0.1 ft, at 9:18 am and then begins to rise. Assume that the water level, in feet, is given by h(t) = 4.9 sin
+ 5, where t represents the number of hours after midnight. (In other words, the marker was placed in the water when t = 6.) Find the first time interval during which the marker is completely underwater.
A. Approximately from 2:06 pm to 4:24 pm Monday B. Approximately from 1:42 pm to 5:18 pm Monday C. Approximately from 1:18 am to 4:54 am Tuesday D. Approximately from 11:24 pm Monday to 2:00 am Tuesday
Simplify. Assume that variables can represent any value.
A. ?z? + 6 B. -z - 6 C. z + 6 D. ?z + 6?