Define variables and write an equation to model the situation. the total length of rope, in feet, used to put up tents is 60 times the number of tents. a. ℓ = total length in feet n = number of tents ℓ = 60n b. ℓ = total length in feet n = number of tents n = 60ℓ c. ℓ = total length in feet n = number of tents ℓ = 60 + n