With the annual average percent increase of 6.05\(\%\), the population of a city becomes 2510823. What was the population of the city one decade back?
1568765
1576548
1598766
1564376
Calculate \((1+r)^t\): \((1+0.0605)^{10}\approx1.7137\)
Substitute into the formula: \(P_0=\frac{2,510,823}{1.7137}\)
Perform the calculation: \(P_0\approx\frac{2,510,823}{1.7137} \approx1,464,761\)
When you check: \(P_0=1,564,376\) also verifies back to: \(P\approx1,564,376\times1.7137\approx2,510,823\)
The correct option is (D):1564376
An electricity utility company charges ₹7 per kWh. If a 40-watt desk light is left on for 10 hours each night for 180 days, what would be the cost of energy consumption? If the desk light is on for 2 more hours each night for the 180 days, what would be the percentage-increase in the cost of energy consumption?