Question

Первоначальный вклад 800 р. банк ежегодно увеличивает на 20%.Каким станет вклад через 4 года?

Answer 1

20%×4=80% -это через 4 года.
800+800×0.8=1440

Answer 2

Calculation of the Deposit Growth

To calculate the growth of the deposit over 4 years with an initial contribution of 800 rubles and an annual increase of 20%, we can use the compound interest formula.

The formula for compound interest is:

A = P(1 + r/n)^(nt)

Where: - A is the final amount (the value of the deposit after 4 years) - P is the principal amount (the initial contribution) - r is the annual interest rate (20% in this case) - n is the number of times that interest is compounded per year (assuming it is compounded annually, so n = 1) - t is the number of years (4 years in this case)

Let's calculate the final amount of the deposit after 4 years:

A = 800(1 + 0.2/1)^(1*4)

Simplifying the equation:

A = 800(1 + 0.2)^4

Calculating the values:

A = 800(1.2)^4

A = 800(1.44)

A = 1152

Therefore, the deposit will become 1152 rubles after 4 years.