PLEASE THIS IS URGENT!! TIMED: A survey will be given to high school students asking how many hours of TV they watch per week. To find the mean number of hours of TV per week, how many students must be sampled to get a 95% confidence interval with a maximum error of 0.3 hours? Use a standard deviation of 1.15 hours. 39 students
40 students
56 students
57 students

You can find the constant of proportionality by finding the ratio of

What value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?

Consider the following geometry problems in 3-space enter t or f depending on whether the statement is true or false. (you must enter t or f -- true and false will not work.) f equation editorequation editor 1. a plane and a line either intersect or are parallel t equation editorequation editor 2. two planes parallel to a third plane are parallel f equation editorequation editor 3. two lines either intersect or are parallel f equation editorequation editor 4. two planes orthogonal to a third plane are parallel f equation editorequation editor 5. two planes orthogonal to a line are parallel f equation editorequation editor 6. two planes either intersect or are parallel f equation editorequation editor 7. two lines orthogonal to a third line are parallel t equation editorequation editor 8. two lines parallel to a third line are parallel t equation editorequation editor 9. two planes parallel to a line are parallel f equation editorequation editor 10. two lines parallel to a plane are parallel f equation editorequation editor 11. two lines orthogonal to a plane are parallel