Sea f(x)=In(x^2) y su derivada f’(x)=(2/x) La tangente al gráfico de f en el punto P(d, f(d)) para por otro punto Q(1, -3). Halle el valor de d

Me its important ! marge runs an ice cream parlor. her speciality is triple chocolate sundaes. she can prepare 1 sundae every 2 minutes, and she earns $1.20 for each sundae she makes . if she just makes sundaes for a single shift of at most 4 hours and at least 2 hours , which function relates her earnings to the number of minutes she works?