Answer:
V = 1,372 ft³
Step-by-step explanation:
You have been given the equation necessary for calculating the volume of a sphere:

In this formula, "V" represents the volume, "π" is the given value (3), and "r" is the radius. While you have not been given the radius, you have been given the diameter (14 ft). The radius is half of the diameter.
radius = diameter / 2
radius = 14 ft / 2
radius = 7 ft
Now, you can plug this value into the formula and simplify to find the volume.
<----- Volume formula
<----- Plug 3 in for "π"
<----- Plug 7 in for "r"
<----- Solve 7³
<----- Multiply all the terms together