Question

if the temperature starts at -25 degrees and decreases 15 degrees, what will the final temperature be?

Answer 1

We will investigate an example regarding temperature data given and initial temperature and the rate at which the temperature increases or decreases.

The initial temperature given to us is as follows:

$T_i\text{ = -25 degrees}$

The rate at which the temperature decreases/increases is:

$r\text{ = }T_f-T_i$

We are given that the temeperature decreases by a certain amount ( r ) as follows:

$r\text{ = -15 degrees}$

We will use the definition of rate ( r ) expressed as an equation and determine the final temperature for the given:

$T_i=-25,r=-15,T_f\text{ = ?}$

Plug in the respective values in the expression defined and evaluate the final temperature:

$\begin{gathered} -15\text{ = }T_f\text{ - (-}25\text{ )} \\ -15\text{ = }T_f+\text{ 25} \\ T_f\text{ = -15 - 25} \\ T_f\text{ = -30} \end{gathered}$