A person standing close to the edge on the top of a 200-foot building throws a baseball vertically upward . The quadratic function $$s ( t ) = - 16 t ^ { 2 } + 64 t + 200$$ models the ball's height above the ground , s(t) , in feet, t seconds after it was thrown.
a. After how many seconds does the ball reach its maximum height? What is the maximum height?
b. How many seconds does it take until the ball finally hits the ground? Round to the nearest tenth of a second?
c. Find s(0) and describe what this means.
d. Use your res ults from parts (a) through (c) to graph the quadratic function . Begin the graph with t = 0 and end with the value oft for which the ball hits the ground.

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.

step-by-step explanation:

two pairs of adjacent sides are of equal length. this implies that one diagonal divides the kite into congruent triangles, and so the angles between the two pairs of equal sides are equal in measure. it also implies that the diagonals are perpendicular.