- Whats the domain of f -1(x)?

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Scientifically when will humans go extinct? I hear in 100-200 years, then i hear 100k years? A trough is 15ft long&4 ft across.Its ends are isosceles triangles w/height 3ft. Water runs in at 2.5 ft^3/min.How fast water rises when 2ft? Precalc question: How what I solve this type of word problem and what is it asking me to do? Word problem is one of my struggle in math.? A 1430 kg car speeds up from rest to 14.0 m/s in 7.00 seconds. Ignoring friction, how much power did that require? If the body temperature is constant, why does it feel cold in winter?