115% is the same as 1.15
some number = x

115% of some number is 120
1.15 of x is 120
1.15 * x = 120
$\frac{1.15*x}{1.15} = \frac{120}{1.15}$
x = 104.3478
x ≈ 104.3

Hope this helps! :)

4 0

3 years ago

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a boat costs 11,850 and decreases in value by 10% per year. how much will the boat be worth after 8 years

lawyer [7]

If the boat initially cost $11850 and INCREASED in value by 10% per year, we'd calculate the final value like this:

V = $11850(1+0.10)^8

But if the boat is losing value (depreciating) over time, we'd calculate its final value like this:

V = $11850(1-0.10)^8 = $11850(0.90)^8 = $11850(0.4305) = $5101.04 (answer)

5 0

3 years ago