What is the value of x?

Joseph haydn pet store offers wide variety of leashes for dogs. the store purchases one popular type of leash from its manufacturer for $4.38 each. joseph haydn pets marks up leashes at a rate of 238% of cost. what is the retail price of the popular leash?

If the wwight of a package is multiplied by 7/10 the result is 65.8 find the weight of the package

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?