Let f(x)=-4x-2 and g(x)=5x-6. find f×g and state it's domain

a) -20x^2+14x+12; all real numbers

b) 8x^2+34x-30; all real numbers

c) 8x^2+34x-30; all real numbers except x=1

d) -20x^2+14x+12; all real numbers except x=6

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?