I would recommend MathPapa for this.
First, multiply 50*3 to get the answer in feet which is 150 ft.
Then, divide 150 ft by 60 which would be 2.5 ft per second.

Above, I changed the fraction form of x and y into exponential form so it is easier to see the differentiation. Now, we can differentiate:

Now that we have dy/dx, we can plug in the x, which is 4, and the y, which is 4/19. We know these values of x and y because your question stated y(4) = 4/19.
Answer:
12 shoes
Step-by-step explanation:
Because 6 times 2 is 12 and 4 times 3 is 12. And that is the lowest common number that they share.