You want to determine the number of students in your school who have visited the public library. You survey 30 students at random. Twenty-four have visited a public library, and six have not. So you conclude that 80% of the students in your school have visited a public library. Is it valid or not valid?

Sketch the vector field vector f( vector r ) = 8vector r in the xy-plane. select all that apply. the length of each vector is 8. the lengths of the vectors decrease as you move away from the origin. all the vectors point away from the origin. all the vectors point in the same direction. all the vectors point towards the origin. the lengths of the vectors increase as you move away from the origin.