The density curve represents the amount of extra time, in minutes, that a group of students slept after hitting the snooze button on their alarm clocks. What percentage of students snooze between 6 and 12 extra minutes before rising?

35%
40%
50%
60%

step-by-step explanation:

486in is correct

step-by-step explanation:

place r′ so that qr′ is parallel to the tangent.

now we get that ∠r′py=∠pr′q, where y is on the tangent, on the opposite side of p from x.

also, because of the symmetry, ∠r′py=∠qpx.

finally, note that no matter where we place r, as long as it's on the correct arc, we have ∠prq=∠pr′q.

stringing all these equalities together, we end up with ∠prq=∠qpx.

this picture will show how its going to look like.

hope this by jack monhen