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What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)

Peter measures the angles in a triangle. he finds that the angles are 95, 10 and 75. is he correct? explain your answer

You are saving to buy a bicycle; so far you save 55.00. the bicycle costs 199.00. you earn 9.00 per hour at your job. which inequality represents the possible number of h hours you need to work to buy the bicycle?