What fraction is more than 0 but less than 4/10? Idk if I am even asking the question correctly!

Can someone me my sister? she is in third grade. 50 points and brainlist! ones that are not answered. plz and thx!

The formula for the lateral area of a right cone is la = rs, where r is the radius of the base and s is the slant height of the cone.which are equivalent equations?

Which system of linear inequalities is represented by the graph?