Some explain this ??

How many natural numbers n satisfy the inequality: 1/7 < n/10 < 4/5 ?

Which of the following equations is of the parabola whose vertex is at (4, 3), axis of symmetry parallel to the y-axis and focus at (4, -3)? a.) y+3=1/24 (x+4)^2 b.)y-3=-1/24 (x-4)^2 c.)x-4=-1/24 (y-3)^2

If your teacher tells you to do questions 6 through 19 in your math book for homework, how many questions is that