Adepartment store is having a sale where a pocketbook is on sale for 1/4 off the retail price. then entitled 30% off the sale price. the retail price is 800. what will have to be pay in sales tax if the tax is 9% of the final price of the pocketbook?

$800 x .25 = $200 (1/4 off the retail price)

$800 - $200 = $600 (Sale Price)

$600 x .30 = $180 (entitled 30% off)

$420 (Final Price) x .09 (tax) = $37.80

Sales Tax on Final Price (Answer): $37.80

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq