Question

СРООООЧНО ПОМОГИТЕ ПЖ!!!! С МЕНЯ 35 БАЛЛОВ 1)Банк за два года начислил на вклад 69%. Сколько процентов годовых начисляет банк, если ставка за два года не менялась, а проценты присоединяются к сумме вклада? 2)35% жителей страны составляют пенсионеры. Среди пенсионеров 60% - женщины. Сколько процентов от числа всех жителей страны составляют мужчины-пенсионеры?

Answer 1

1) 30%
169=100(1+1/100)^2


2)14%
35/100=0,35
40*0,35=14

Answer 2

Calculation of Annual Interest Rate on a Bank Deposit

To calculate the annual interest rate on a bank deposit, we can use the formula:

Annual Interest Rate = (Total Interest / Principal) * (100 / Number of Years)

In this case, the bank has accrued a total of 69% interest on the deposit over two years. Since the interest is added to the principal, the total amount after two years will be the principal plus the interest.

Let's assume the principal amount is P. After two years, the total amount will be P + 69% of P.

Using the formula mentioned above, we can calculate the annual interest rate as follows:

69 = (0.69P / P) * (100 / 2)

Simplifying the equation:

69 = 0.345P

Dividing both sides by 0.345:

P = 69 / 0.345

Calculating the value of P:

P = 200

Therefore, the principal amount is 200.

Now, we can calculate the annual interest rate:

Annual Interest Rate = (Total Interest / Principal) * (100 / Number of Years)

Annual Interest Rate = (69 / 200) * (100 / 2)

Simplifying the equation:

Annual Interest Rate = 34.5%

So, the bank is offering an annual interest rate of 34.5% if the interest is added to the principal amount.

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