The 6 in 216 is in the ones place.
The slope is 2. rise over run.
Pretty sure this one is 52.6, you should download this app called calculator X, it gives you stuff to help answer these questions
For this case we must divide the following expression:

The expression can not be simplified. When dividing we have that its decimal form is given by:
3,201550
If we convert to a mixed number we have:

Verifying:

Answer:

The area of a triangle is 1/2 x base x height
Area = 1/2 x 24 x 28 = 336 square inches.
Because the corners are rounded the are would actually be just under 336 but no radius was given to get the exact area.