Question

A.

Answer 1

Using exponential function concepts, it is found that the student error is in the subtraction of the day rate, as he forgot to subtract from 100% = 1.

What is an exponential function?

A decaying exponential function is modeled by:

$A(t) = A(0)(1 - r)^t$

In which:

• A(0) is the initial value.

• r is the decay rate, as a decimal.

In this problem, the initial value of the computer is of A(0) = 1500, while it decays at a rate of 15% a year, hence r = 0.15 and the equation is:

$A(t) = A(0)(1 - r)^t$

$A(t) = 1500(0.85)^t$

Or equivalently, as a sequence:

$a_n = 1500(0.85)^{n-1}$

Hence, it is found that the student error is in the subtraction of the day rate, as he forgot to subtract from 100% = 1.

More can be learned about exponential function concepts at brainly.com/question/25537936