Question

ПОМОГИТЕ РЕШИТЬ ЗАДАЧИ. 1)Чашка, которая стоила 90 рублей, продаётся с 10%-й скидкой. При покупке 10 таких чашек покупатель отдал кассиру 1000 рублей. Сколько рублей сдачи он должен получить?2)Арбуз весил 20 кг и содержал 99 процентов воды,когда он немного усох то стал содержать 98% воды. Сколько теперь весит арбуз?3)Вкладчик разместил сумму размером 42500 рублей в банк. Определите, какую сумму получит вкладчик через 2 года, если процентная ставка составляет 17 % в год.(пр необходимости округлите до сотых)​

Answer 1

1) Ответ:

190р

3) 42500•0,34 будет ответ

Answer 2

Task 1: Calculation of Change

To solve this problem, we need to find the amount of change the customer should receive after purchasing 10 cups with a 10% discount.

The original price of the cup is 90 rubles, and it is sold with a 10% discount. To calculate the discounted price, we can multiply the original price by (100% - 10%) = 90%.

Step 1: Calculate the discounted price of one cup: Discounted price = 90 rubles * (90% / 100%) = 81 rubles

Step 2: Calculate the total cost of 10 cups: Total cost = 81 rubles/cup * 10 cups = 810 rubles

Step 3: Calculate the change the customer should receive: Change = Amount paid - Total cost Change = 1000 rubles - 810 rubles = 190 rubles

Therefore, the customer should receive 190 rubles in change.

Task 2: Calculation of Weight Loss of Watermelon

To solve this problem, we need to find the weight of the watermelon after it loses some water content.

The watermelon initially weighs 20 kg and contains 99% water. After it dries out a bit, it contains 98% water.

Step 1: Calculate the weight of water in the watermelon initially: Weight of water = 20 kg * (99% / 100%) = 19.8 kg

Step 2: Calculate the weight of the watermelon after it dries out: Weight of watermelon after drying = Weight of water / (98% / 100%) Weight of watermelon after drying = 19.8 kg / (98% / 100%) ≈ 20.2041 kg

Therefore, the watermelon now weighs approximately 20.2041 kg.

Task 3: Calculation of Deposit Amount

To solve this problem, we need to calculate the amount the depositor will receive after 2 years with a 17% annual interest rate.

The depositor placed 42,500 rubles in the bank, and the interest rate is 17% per year.

Step 1: Calculate the interest earned after 2 years: Interest earned = Deposit amount * (Interest rate / 100%) * Time Interest earned = 42,500 rubles * (17% / 100%) * 2 years = 14,450 rubles

Step 2: Calculate the total amount the depositor will receive: Total amount = Deposit amount + Interest earned Total amount = 42,500 rubles + 14,450 rubles = 56,950 rubles

Therefore, the depositor will receive 56,950 rubles after 2 years.

Note: The amounts have been rounded to the nearest whole number for simplicity.

I hope this helps! Let me know if you have any further questions.