If you are going from a larger unit to a smaller unit, you multiply. If you are going from a smaller unit, you divide
D is the answer i think it is at least
Answer:
1st one a^-1 , 2nd one a^b/a^c , 3rd one a^c/b^c
either $0.50 × $1 or $0.50÷ $1 hope this answer helps
