Question

Ling earns $8 per hour working at the zoo. Write and solve an inequality that can be used to find how many hours she must work in a week to earn at least $120. Interpret the solution.

Answer 1

Ling should atleast work 15 hours a week to earn $120.

Explanation:

Ling earn per hour = $8

Let the number of hours she worked to be x.

Now, inequality =

`8x \geq 120`

Dividing both side by 8.

`(8x)/(8) \geq (120)/(8)`

`x \geq 15`

Hence, Ling should atleast work 15 hours a week to earn $120.