The domain for f(t) is all of the numbers t for which f(t) is defined.
In other words, its all of the numbers that t minutes can be and still make sense in the function.
f(t) is distance from sea level as a function of time. It does not make sense to have negative time, so t must be 0 or a positive number. t does not necessarily have to be an integer (a whole number), since you can have time values like half a minute.
Answer is <span>C. the set of all real numbers greater than or equal to zero</span>
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A cotangent (cot) is the adjacent side (not the hypotenuse or side not containing the right angle) over the opposite side, so
or the third answer.
