Write as a numeral 3×10+3+(3×1/10)+(5×1/100)+(9×1/1000 )

Agreeting card company can produce a box of cards for $7.50. if the initial investment by the company was $50,000, how many boxes of cards must be produced before the average cost per box falls to $10.50?

How many grams the dog will eat in 3 days?

The owner of the plant nursery where you were tells you to fill 350 ml bottles from a 30 l from a fertilizer