Can someone check my answer make sure it's right, if it's wrong can you please explain thanks ❤️❤️​

Find the values of y: 3y^3(y^2+ 2/3y)=0

Which of the following scenarios demonstrates an exponential decay

Which statement is true about the extreme value of the given quadratic equation? a. the equation has a maximum value with a y-coordinate of -21. b. the equation has a maximum value with a y-coordinate of -27. c. the equation has a minimum value with a y-coordinate of -21. d. the equation has a minimum value with a y-coordinate of -27.