The Fabulous Fish Market orders tilapia, which costs $3 per pound, and salmon, which costs $5 per pound. The market budgets $210
to spend on this order each day. Define variables and write an equation representing the relationship between the amount of each fish bought and how much the market spends.
Not sure if the question is complete, but if the cell doubles every five minutes, you must first double the one, then simply square the answer every five minutes.