Solve. Remember to insert units when writing your answer.The highway commission is installing concrete sound barriers along a highway. Each barrier is 2 yd 2 ft long. Find the total length of 7 barriers placed end to end.
A. 26 yd 2 ft
B. 18 yd 2 ft
C. 18 yd 1 ft
D. 6 yd 1 ft
Answer: B
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Solve the inequality.For the function g(x) = x4 - 81x2, solve g(x) < 0.
A. (-9, 0) ? (0, 9) B. (-?, -9) ? (0, 9) C. (-?, -9) ? (9, ?) D. (-9, 0) ? (9, ?)
Find the exact function value.tan-1 (1)
A. 1
B. 0
C. 
D. 
A water-filled ice tray is placed in a freezer that maintains a constant temperature of 6 degrees Fahrenheit. The table below shows the difference 
between the temperature T of the water in the ice tray, in degrees Fahrenheit, and the temperature the freezer.
t051015 D71.0057.8947.2038.49? A: Find an exponential model for the data. Be careful. The data are given in steps of 5 seconds. Round your answer to two decimal places, if necessery.B: Find a formula that gives the temperature T after t minutes. Round your answer to two decimal places, if necessery.C: Make a graph of T versus t over the first 30 minutes. Include the horizontal line representing the freezing temperature of water, 32 degrees.D: According to the model, how long does it take for the water to reach 32 degrees? Round your answer to two decimal places. What will be an ideal response?
Solve the problem.From a distance of x feet to a 190-meter-high radio tower, the angle of elevation is ? degrees. Then 
Use a reciprocal identity to rewrite this formula.
A. 190 cot ?
B. 
C. 190 sec ?
D. 