Answer:
8.75 inches
Step-by-step explanation:
We are given that Elisa bought a kit to make a model of a jet airplane
The length of actual plane=21 feet
The length of wingspan in actual plane =17.5 feet
In the model
Length of airplane=10.5 inches
We know that 1 foot=12 inches
Length of actual plane=[tex]21\times12=252 inches[/tex]
Length of wingspan in actual plane=[tex]17.5\times 12=210 inches[/tex]
If a length of plane is large then length of its wingspan is large and if a plane is short then its wingspan is short also.
It is directly proportional
if x is directly proportional to y
Then ,x=ky
[tex]k=\frac{x}{y}[/tex]
Let x be the length of wingspan in model
Then, using directly proportional property
[tex]\frac{252}{210}=\frac{10.5}{x}[/tex]
[tex]x=\frac{10.5\times 210}{252}[/tex]
[tex]x=8.75[/tex]
Hence,length of wingspan in model=8.75 inches
