400
Ms. Miranda has been saving money to buy a new baby crib. Each week she saves money. The first week she saves $25, The next week she saves $50. The third week she saves $100. How many total weeks will it take her to have $800 to buy the crib?
Each week the amount is doubling so on wk 4 she will have $200, then on wk 5 she will have $400 and finally wk 6 she will have $800 to buy the crib.