Nina saved money in her piggy bank to buy a music player she started by saving $30

Ill mark the brainliest if you me with the these three questions 7,8,9

The bake stars picked 907 apples last weekend at a local orchard they made caramel apples and sold them in the bakery in trays of 6

An investment decreases in value by 30% in the first year and decreases by 40% in the second year. what is the percent decrease in percentage in the investment after two years