The circumference, c, of a circle varies directly as the diameter. If the circumference is 44cm when the diameter is 14 cm, find the circumference when the diameter is 21 cm.

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⭐

just needed some points but try socratic

what