What is the full price of 90 tablets of "drug y", assuming your cost for 500 tablets is $425.00 with a 28% markup and a dispensing fee of $4.85 ?

Can some one me with these questions

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.

Select all of the following expressions that are equal to 2.5.