When granular materials fall, they form conical piles. The angle of slope, measured from the horizontal, at which the material comes to rest is called
the angle of repose. The angle of repose is related to the height h and base
r radius r of the conical pile by the equation 0 = cot-1 r/h. When a certain granular material is stored in a pile 8 feet high, the diameter of the base of the pile is 65 feet. What is the base diameter of a pile that is 17 feet high?

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.

$450 is the answer.

step-by-step explanation:

30% of 450 = 135

450-135=315

d i think

step-by-step explanation:

the answer is a beach is the best place to be