**Answer:**

The domain is -418 < a < 8848 where a is an integer.

**Step-by-step explanation:**

We see from the data given that the domain of T(a) takes both positive and negative integer values ( 8848 meters and -418 meters); T(a) never gets decimal values (and in real life thy won't be of much use because we are not looking for that much accuracy).

So the appropriate number type for the domain of T(a) would be integers. And if you are interested, the domain is -418 < a < 8848.

**Answer:**

she needs 8 inches of ribbon to make both bows.

The first one can be done by Pythagoras theorem such as

then

then

The second one can also done by Pythagoras theorem, note that this is isosceles triangle so

, again by using Pythagoras theorem

then

then

For the last one can also done by property of 30-60-90 triangle.