what is the equation of the graph below?

a graph shows a parabola that opens down and crosses the x axis at two and four.

y = − (x − 3)2 + 1
y = − (x + 1)2 + 4
y = (x + 1)2 − 4
y = (x − 4)2 + 1

(urgent ) use pi 3.14 to estimate the circumference of the circle to the nearest hundredth middle is 4in (urgent )

The parabola opens: y=√x-4 (principal square root) up down right left

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable