Evaluate without using a calculator, leaving the answers in exact form.
?
?
A. 
B. 
C. 0
D. -1
E. 
Answer: A
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Use the graph to find a ? > 0 such that for all x, 0 < 
< ? ? 
< ?.
A. 0.1 B. 0.2 C. 0.4 D. 3
Find the eccentricity of the hyperbola.8x2 - 9y2 = 72
A. 
B. 
C. 
D. 
Solve the problem.There are 2.439 × 102 miles of highways, roads, and streets in a certain city. Express this quantity in standard notation.
A. 2439 mi B. 24,390 mi C. 24.39 mi D. 243.9 mi
Solve the problem.As one approaches a certain sound source, the sound intensity in arbitrary units increases according to the following function of time (in seconds):F(t) = - 
.Starting at t = 0, when the source of sound is first sensed, how much time elapses until maximum sound intensity is felt? Round the result to the nearest hundredth.
A. 0.44 sec B. 42.53 sec C. 25.15 sec D. 2.53 sec