5/16÷(-)=-45/18 plz answer​

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?

32a³b² 8ab² simplify the following expression.

Cate purchases $1600 worth of stock and her broker estimates it will increase in value by 4.2% each year. after about how many years will the value of cate's stock be about $2000