Let f be the function given by f(x)=5cos2(x2)+ln(x+1)−3 . The derivative of f is given by f′(x)=−5cos(x2)sin(x2)+1x+1 . What value of c satisfies the conclusion of the Mean Value Theorem applied to f on the interval [1,4] ?

So don't take my word i'm not exactly a mathematical person but i would assume a. because while selling the soap every month you increase in sells so you would by 11 percent. the you would get the factor 0.89 which if i had to guess would be the monthly profit over 11 probably wrong tho