An obtuse angle is an angle with more than 90 degrees and less than 180. so, we can add < 180 and > 90 to the expression, making it the inequality 180 < 3x + 24 > 90. we then solve.
3x + 24 > 90 and 3x + 24 < 180 3x > 66 and 3x < 156 x > 22 and x < 52
so x can be anything more than 22 and less than 52 (it cannot be 52 or more or 22 or less)
I will define or explain about discrete and continuous data. Discrete data is the data that can count or data that have finite values or buckets while continuous is the data that cannot count or the data that have infinite number of steps, which form continuum. In your example, we can include that gravel in pile as a continuous data because we cannot count it just like the sand. The answer is continuous.