Đầu tháng ,bếp ăn của nhà trường dự trữ gạo đủ cho 100 học sinh '' bán trú'' ăn trong 26 ngày ,thực tế nhà trường có thêm 30 học sinh ''bán trú'' nữa .Hỏi số gạo dự trữ đó đủ cho học sinh ăn trong bao nhiêu ngày

225/100 of last years cost. write each fraction as a decimal and as a percent

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

A) if $50000 is invested in a bank account that pays 9.3% of interest compounded on a six-monthly basis, how much money will be in the account after 3 and 12 years? b) if matusalen's father had put $2.0 in the bank when he was born and there, how long would matusalen have had to his death (969 years later) if the interest was 7% per year composed each month and weekly?