Question

Question
David found a new part-time job that pays $2400/month. This is 5 times what he made at his previous job. What was David’s yearly salary at his old job?(1 point)
Responses

$144,000 a year
$144,000 a year

$28,800 a year
$28,800 a year

$5760 a year
$5760 a year

$480 a year

Answer 1

To find David's yearly salary at his old job, we can start with his new salary.

David's new job pays $2400 per month. Since this amount is 5 times what he made at his previous job, we can find his monthly salary at his old job by dividing his new salary by 5:

\[
\text{Old monthly salary} = \frac{\text{New monthly salary}}{5} = \frac{2400}{5} = 480
\]

Now, to find the yearly salary at his old job, we multiply the monthly salary by 12 (the number of months in a year):

\[
\text{Old yearly salary} = \text{Old monthly salary} \times 12 = 480 \times 12 = 5760
\]

Therefore, David’s yearly salary at his old job was **$5760** a year.