Tiffany buys a basket of watermelons on sale for $9 before tax. the sales tax is 9% what is the total price tiffany pays for the basket of watermelons?

Np4=12np2 with clear explanation.

In a box lenght 1m breadth 60 cm and height 40 cm small rectangular packets of dimension 5 cm into 8 cm into 10 cm are packed. how many such small packets can be packed in the big box?

The cash price of a television is $580.the hire-purchase price of the television is $865.the hire-purchase price is an initial deposit of n% of the cash price and 6 equal monthly payments of $120.find the value of n.