Find the missing angle

Moira has a canvas that is 8 inches by 10 inches. she wants to paint a line diagonally from the top left corner to the bottom right corner. approximately how long will the diagonal line be?

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?

Write an equation of the parabola with the focus point of (0,1/3) and vertex at the origin. use x for the independent variable. explain. need !