diiamondgraham1
20.05.2021 •
Mathematics
Marcos purchased a sail boat for $56,900. He anticipates each year the boat will decrease in value by 8.1% from the previous year.
Write an exponential function that models the value in dollars of the boat x years after Marcus's purchase.
Question 18 options:
f(x)=0.919(56900)x
f(x)=56900(0.919)x
f(x)=0.081(56900)x
f(x)=56900(0.081)x
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Ответ:
Hey there! I'm happy to help!
When working with percents, the word "is" means "equals". We can use this to make an equation. The decimal form of 40% is 0.4. Our number will be represented by the variable n.
22=0.4n
Flip equation around so n is on the left (you don't have to do this, but I like having the variable on the left)
0.4n=22
We divide both sides by 0.4
n=55
Therefore, your answer is B) 55.
Have a wonderful day! :D