Question

Батарейка стоит 21 руб. 20 коп. Какое наибольшее число батареек можно купить на 240 руб. во время распродажи, когда сидка состовляет 9%? При расчете цены слудует округлить число до одной копейки.

Answer 1

9%= 0,09 

1) 21,20*0,09 = 1,91 (р.)- составляет скидка.

2) 21,2-1,91 = 19,29 (р.)- цена на разпродаже.

3) 240:19,29 = 12 (б.)- можно купить.

Ответ: 12 батареек можно купить на 240 рублей. 

Answer 2

1 батарейка - 21 руб. 20 коп. 

Скидка - 9 %. 

Составим пропорцию: 

21 руб. 20 коп - 100 % 

х руб              - 91 % (100-9) 

$х=\frac{2120 * 91}{100}$

 

х=1929, 2 коп округляем: 19 рублей 20 копеек 

 

Наиб. число равно $\frac{240}{19,29}$

 

Итого: 12

 

Answer 3

Calculation of the Maximum Number of Batteries

To calculate the maximum number of batteries that can be purchased for 240 rubles during a sale with a 9% discount, we need to consider the price of a single battery, the discount, and the total budget.

Given: - Price of a battery: 21 rubles 20 kopeks - Discount: 9% - Total budget: 240 rubles

To calculate the discounted price of a single battery, we subtract the discount amount from the original price: 21 rubles 20 kopeks - 9% = 19 rubles 36 kopeks.

Next, we divide the total budget by the discounted price of a single battery to find the maximum number of batteries that can be purchased: 240 rubles / 19 rubles 36 kopeks = 12.36.

Since we cannot purchase a fraction of a battery, we need to round down to the nearest whole number. Therefore, the maximum number of batteries that can be purchased is 12.

Please note that the calculation assumes that the price of each battery remains constant during the sale and that the discount is applied to the original price of the battery.