I'll give you a BRAINLIEST if you help me with these questions and they have to be correct. 1. Which of the following types of mirrors has an optical axis?

A) Convex Mirror
B) Concave Mirror
C) Double Convex Mirror
D) All of the choices are correct

2. Which of the following types of mirrors refracts light rays that pass through it outward and away from the optical axis?

A) Convex Mirrors
B) Plane Mirrors
C) Concave Mirrors
D) All of the choices are correct

3. The bending ability of a substance is recorded on the index of refraction.
True
False

4. Light travels at the same speed at all times.
True
False

i believe the answer is a

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day