Can someone help with number 4 i don’t understand

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

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180

The triangle shown has a hypotenuse with a length of 13 feet. the measure of angle a is 20 degrees. and the measure of angle b is 70 degrees. which of the following is closest to the length, in feet, of line segment ac? no need to use a calculator to find the trig numbers. each function is listed below. 4.4 5 12.2 35.7