Question 475585
The slope of the ceiling is defined as the rise (in this case 8 feet) divided by the horizontal distance (for this problem 29 feet). So the slope that you are looking for is:
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{{{8/29 = 0.275862069}}}
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The problem instructs you to round your answer to two decimal places.  Look at the third decimal place. It is a "5". If it is 5 or greater, you increase the second decimal place by 1 and drop everything after the second decimal place. So increase the second decimal place from 7 to 8 and drop everything after the second decimal place.  When you do that the answer to this problem is:
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{{{slope = 0.28}}}
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I hope this helps you to understand this problem a little better.