Help plz​

a) 20ft

Step-by-step explanation:

just multiply the model length and the scale factor

7! = 7×6×5×4×3×2

3! = 3× 2

as 7! is multiple of 3! because 7! contains 3! that is 3× 2 as factor

so 7! /(3! ) = 7× 6× 5× 4

= 42 × 20

= 840

its b) 840✌✌✌

dhruv⭐

i think that you should ask google for the answer to that problem because if we don't know it google does