Solve. Provide answers in interval notation.
> 0
A. (5, -?)
B. (-?, 5)
C. (-5, ?)
D. [5, ?]
Answer: C
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Find or investigate the function as requested.If water is added to an empty tank such that the water level rises by 2 cm every 25 minutes, then what is the level of the water L(t) in the tank after t minutes?
A. L(t) = 50t
B. L(t) = 2t
C. L(t) = 
t
D. L(t) = 
t
Factor using the formula for the sum or difference of two cubes.125x3 - 27
A. (5x + 3)(25x2 - 15x + 9) B. (5x - 3)(25x2 + 9) C. (5x - 3)(25x2 - 15x + 9) D. (5x - 3)(25x2 + 15x + 9)
Solve the problem.If two sound sources at the same volume are equidistant from a microphone, the pressure on the microphone is given by p = a cos ?1t + a cos ?2twhere a, ?1, ?2 are constants and t is time. Write p as a product of cosine functions.
What will be an ideal response?
Express in terms of i.
A. ±3
B. -i
C. 3i
D. -3i