Glenn bought a car for $ 600,000.The yearly depreciation of his car is 10% of its value at the start of the year.What is its value after 4 years?

each year the car is worth 90% of its prior value, so

600000*0.9^4

That's some car!! Sure it was not a house or a yacht?

To find the value of Glenn's car after 4 years, we need to calculate the yearly depreciation and subtract that amount from the initial value of the car.

The yearly depreciation is 10% of the value at the start of each year.

In the first year, the depreciation is 10% of $600,000, which is $60,000. So, after the first year, the value of the car is $600,000 - $60,000 = $540,000.

In the second year, the depreciation is 10% of $540,000, which is $54,000. So, after the second year, the value of the car is $540,000 - $54,000 = $486,000.

In the third year, the depreciation is 10% of $486,000, which is $48,600. So, after the third year, the value of the car is $486,000 - $48,600 = $437,400.

In the fourth year, the depreciation is 10% of $437,400, which is $43,740. So, after the fourth year, the value of the car is $437,400 - $43,740 = $393,660.

Therefore, the value of Glenn's car after 4 years is $393,660.