In the gift shop of the history of flight museum elisa bought a kit to make a model of a jet airplane. the actual plane is 21 feet long with a wingspan of 17.5 ft. if the finish model will be 12 in long what will the wingspan be?

Assuming the model has a consistent scale, the applicable proportion is
  wingspan/(actual wing) = length/(actual length)
  wingspan/(17.5 ft) = (12 in)/(21 ft)
  wingspan = (17.5 ft)/(21 ft)*(12 in) = 10 in

The model's wingspan will be 10 inches.

Hnmmmn not sure

32

step-by-step explanation:

these are your clues: 1. kim ran 18 races2. this was four fewer races than twice thenumber, notice it says twice the number, so you would do the equation 18x2-4; which equals the number 32.thus, 32 is your answer.