
Hey! Start by finding the radius. We will assume that point
is the center point of the circle, so the radius is the distance between points
and
.
Let's use the distance formula, substituting in the known values:

Simplify:

Now, we'll use the formula for the circumference of a circle, substituting in the known value:

The total circle has a measure of 2π radian, so this portion is 1/(2π) of the whole circle
the circumference of the whole circle is 2πr
1/(2π) of 2πr=3.07
r=3.07
Answer:
2.75 seconds and 133 feet
Step-by-step explanation:
We require to find the coordinates of the vertex of the parabola
the t coordinate ( time ) for a quadratic in standard form is
= - 
with a = - 16 and b = 88
t = -
= 2.75 seconds ← time taken to reach max
to find the max height evaluate f(2.75 )
f(2.75 ) = - 16( 2.75)² + 88(2.75) + 12 = - 121 + 242 + 12 = 133 feet