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I need some help with this Math problems on investments please

I need some help with this Math problems on investments please-example-1

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If the trailer decreases every 10% per year, we will multiply 29,000 by 0.1

10% in decimal form is 0.1

So every year until the 4th year we will multiply that number by 0.1

If we do 29,000x0.1 we’ll get 2,900 that’s year 1
Year 2: 2,900x0.1=290

Year 3: 290x0.1=2.90

Year 4: 2.90x0.1=0.29 which is 29 cents

We can simplify this process by doing
29,000x0.1^4
29,000 is the initial value
0.1 is how much it will decrease
And the 4 is how many times we will repeat this, basically the years
User JudeJitsu
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