Describe the process of rifling a gun: a. What is rifling? b. When is a firearm rifled? c. What effect rifling of a gun barrel has on the flight of the projectile.

a- the arrangement of spiral grooves on the inside of a rifle barrel.

b- When a handgun is fired, the rifling in the barrel puts a spiral spin on the bullet.

c- Rifling works by spinning the projectile about its axis, causing gyroscopic forces that spin-stabilize it throughout its flight; tighter rifling will spin a bullet faster, while looser rifling will spin a bullet slower.

Explanation: i don't have one

the answer is d.index

you would times this by how many days there are in a year 365*400=$146000