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3 years ago

Barry buys a new washing machine.

Mathematics

1 answer:

Snezhnost [94]3 years ago

6 0

Answer:

The machine decreases in value by 20% each year.

After 1 year the machine is worth only .8 of its original value.

The machine will only decrease by .2 * (.8 A) in the second year not .2 * A where A is the original amount.

A1 = .8 A

A2 = .8 A1 = .64 A value of machine after 2 years

.8 is the value Barry needs when the machine is new

.8^n never goes to zero

After 10 years value = .8^10 A = .11 A of its original value

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Step-by-step explanation:

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Ivahew [28]

Check the picture below.

$\bf \textit{Law of Cosines}\\ \quad \\
c^2 = {{ a}}^2+{{ b}}^2-(2{{ a}}{{ b}})cos(C)\implies 
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\\\\\\
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-------------------------------\\\\
\begin{cases}
d=10\\
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If we know this, the variables for this problem are assuming the function is 10(5.5)^x:
x2: 2x1: 1f(x2): 10(5.5)^(2) = 302.5f(x1): 10(5.5)^(1)= 55
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