One evening decreased by 5 degrees farenheit during the first hour after sunset, and then decreased by 2 degrees each hour for the next 7 hours.The temperature increased by 14.5 degrees the next morning and then increased by 11 degrees that afternoon. What was the total change in temperature?

12 kilograms

Step-by-step explanation:

Let's construct an equation for her profits, we will call it P(x), where x is the number of kilograms produced/sold.

We know she has -$108 profit from buying supplies, and for each kilogram she produces, she earns -$16 (or loses $16, if earning negative money bothers you). However, we also know that she earns $25 per kilogram sold.

Constructing the equation with this information, we get:

Setting this equation to zero and solving for x: