Sally is having a hard time remembering formulas for all of the different gas laws. Her chemistry teacher, Mrs. Jones, suggested that she only needs to memorize one formula: the combined gas law formula. Explain how Sally is able to solve gas law problems by remembering only one formula. Also, explain what Sally should do with the variables in the formula if a certain variable is not needed in the problem.

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

i think it's 35 meters

wavelength divides in half and speed stays the same.