A textbook has a regular selling price of $79.99, and is on sale for $65.50. What is the markdown rate?

81.9%

Step-by-step explanation:

(65.50 ÷ 79.99) X 100

93-8=85

855=17

17*4=68

there are 68 purple marbles in that bag

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