David wants to measure the diameter of his circular pool. He measures around the pool edge and finds that it has a circumference of approximately 85 feet. Find the diameter.

given : the shape of his satellite can be modeled by   where x and y are modeled in inches.

now,the given equation   is a equation of parabola.

here, coefficient of x is positive, hence the parabola opens rightwards.

on comparing this equation with standard equation , we get

in standard equation, coordinates of focus=(0,m)

thus for given equation coordinates of focus=(0,1.5)

step-by-step explanation:

answer: c

step-by-step explanation