Question

the national wealth of a country increases by 4% of its value at the beginning of every year find the national wealth of the country in 1985 if it was estimated as 3.125×10^12 in 1983

Answer 1

answer would be 3.125×88×10⁴×10⁴×10²


the correct answer would be now
3125×10816×10⁴×10³

Answer 2

Answer:

$\bf\textbf{Hence, National wealth of the country=}3.380\times 10^{12}$

Step-by-step explanation:

Given : The national wealth of a country increases by 4% of its value at the beginning of every year.

To find : The national wealth of the country in 1985 if it was estimated as $3.125 \times 10^{12}$   in 1983.

Solution :

Time from year 1983 to 1985 = 2 years.

$\text{Principal value = Rs. 3.125}\times 10^{12}$

Rate = 4% and n = 1 ( because the wealth is increasing annually)

$\text{Amount} = \text{Principal}\times (1+\frac{rate}{100\times n})^{n\times Time}\\\\\implies \text{Amount}=3.125\times 10^{12}\times ({1+\frac{4}{100\times 1})^{1\times 2}} \\\\\implies \text{Amount}= 3.380\times 10^{12}$

$\bf\textbf{Hence, National wealth of the country=}3.380\times 10^{12}$