What does it mean when the resulting temperature is above 0 on the number line? What does it mean when a temperature is below 0?

It means that above 0 degrees Celsius the water does not freeze, whereas 0 degrees are freezing teperatures of water.

Step-by-step explanation:

Water freezes at 0 degrees Celsius, but the freezing temperature can be lowered  by adding salt to the water. A student discovered that adding half a cup of salt to  a gallon of water lowers its freezing temperature by 7 degrees Celsius. What is  the freezing temperature of the gallon of salt water?

0° - 7° = -7°

32 cups of popcorn

Step-by-step explanation:

To find how much popcorn 1 cup will produce, multiply 4 by 8, since 1/8 cup produces 4 cups.

4(8)

= 32

So, 1 cup of kernels will produce 32 cups of popcorn.