Do we need the 5.7mm? I need help ASAP

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

An ulcer medication has 300 milligrams in 2 tablets. how many milligrams are in 3 tablets?

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$