Step-by-step explanation:
you multiply the number of lemonades by 1.80 because you're just basically adding 1.80 from each lemonade you sell
Step-by-step explanation:
Let
where



so that

Recall that the derivative of the product of functions is

so taking the derivatives of the individual functions, we get



So the derivative of y(x) is given by

or



You could say each drink is d. And we'll say the total is t. David got 4 drinks,
So... 12.74 + 4d = t
Hope this helps!
sorry i dont have answered
If it's mutiple choice can I see the options :) would make this easier