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Wewaii [24]
2 years ago
14

Two students were asked to find the value of a $1000 item after 3 years. The item was depreciating (losing value) at a rate of 4

0% per year. Which is incorrect? Explain the error. Student 1: `1000(0.6)^{3}=$216` Student 2: `1000(0.4\right)^{3}=\$64`
Mathematics
1 answer:
Yuki888 [10]2 years ago
8 0

Answer:

<em>Student 2 is incorrect because he didn't use the formula properly</em>

Step-by-step explanation:

The exponential function is often used to model natural growing or decaying processes, where the change is proportional to the actual quantity.

An exponential decaying function is expressed as:

C(t)=C_o\cdot(1-r)^t

Where:

C(t) is the actual value of the function at time t

Co is the initial value of C at t=0

r is the decaying rate, expressed in decimal

The initial value of the item is Co=$1000, the rate of decay is r=40%=0.4, and the time is t=3 years.

Substituting into the formula:

C(3)=\$1000\cdot(1-0.4)^3

C(3)=\$1000\cdot0.6^3

C(3)=$216

Student 2 is incorrect because he didn't use the formula properly

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<h3>What is a triangle?</h3>

A triangle is a three-edged polygon with three vertices. It is a fundamental form in geometry. The sum of all the angles of a triangle is always equal to 180°. An isosceles triangle has two sides out of three equal.

A.) The value of n can be found by equating XY and XZ together,

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The length of different legs of the triangle is,

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The series is given as:

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The above series is an arithmetic series, with the following parameters

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Start by calculating the nth term using:

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So, the sigma notation is:

\sum\limits^7_{n=1} {9n - 2}

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