7) heather wants to make a 36% acid solution.
she has already poured 3 1. oz. of a 72%
acid solution into a beaker. how many n.
or of a 9% acid solution must be add to
this to create the desired mixture"?

Long division setup showing an incomplete calculation. 12 is in the divisor, 6839 is in the dividend, and 5 hundreds and 6 tens is written in the quotient. 6000 is subtracted from 6839 to give 839. an unknown value represented by a box is being subtracted from 839. what number should be placed in the box to complete the division calculation?