Solve the problem.The voltage E in an electrical circuit is given by E = 1.6 cos 100?t, where t is time measured in seconds. Find the period.
A. 
B. 50
C. 50?
D. 
Answer: A
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Provide an appropriate response.Which of the following items is undefined and why?tan-1 5 or cos-1 5
What will be an ideal response?
Solve the compound inequality. Write the solution set using interval notation and graph it.-12 < 4b + 4 ? 4
A. [-4, 0]
B. (-4, 0]
C. (-4, 0)
D. [-4, 0)
Solve the problem.If the lengths of the sides of a square are tripled, by what factor will the area change?
A. 6 B. 3 C. 27 D. 9
Solve the problem.The amount of highway mileage (in thousands of miles) U and R in urban areas and rural areas, respectively, can be modeled by the functionsU = 12.88t + 625.48 R = -13.38t + 3286.68 where t represents the number of years since 1980.i) Compare U with R when t = 0. What do these values mean in terms of highway mileage?ii) Compare the slopes of U and R. What do these slopes mean in terms of highway mileage?iii) Predict when the highway mileage in urban areas will equal the highway mileage in rural areas.
What will be an ideal response?