Solve.A hiking trail is 19,008 meters long. How many kilometers long is the trail?
A. 190.08 km
B. 19.008 km
C. 1.9008 km
D. 1900.8 km
Answer: B
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Find the unit tangent vector of the given curve.r(t) = (4 sin3 2t)i + (4 cos3 2t)j
A. T = (4 cos 2t)i - (4 sin 2t)j B. T = (4 sin 2t)i - (4 cos 2t)j C. T = (24 sin 2t)i -(24 cos 2t)j D. T = (sin 2t)i - (cos 2t)j
Provide an appropriate response.Describe briefly how approval voting works.
What will be an ideal response?
Use the earthquake magnitude scale to answer the question.Compare the energy of a magnitude 7 earthquake to that released by a 1-megaton nuclear bomb 
A. 4.2 times as much energy B. 6.3 times as much energy C. 3.6 times as much energy D. 0.7 times as much energy
Simplify the expression. Write the result using positive exponents only.(8x)0 + 8x0
A. 16 B. 9 C. 7 D. 8x + 1