if a circle must have a circumference less than 78.5 inches, what values are acceptable for the radius of the circle? Use pi = 3.14 as an approximation

Question

if a circle must have a circumference less than 78.5 inches, what values are acceptable for the radius of the circle? Use  pi = 3.14 as an approximation

phi · Answer

a circle must have a circumference less than 78.5 inches,

change that to "math"
circumference < 78.5
or just
C < 78.5

do you know the formula for the circumference of a circle ?

anonymous · Answer

< = divide?

phi · Answer

< means "less than"

C < 78.5 is the short way to write
circumference less than 78.5 inches

but you need to know the formula for how to find the circumference. Do you know the formula ?

anonymous · Answer

foruma for circle is  the circumference is 3.14 (p) times the Diameter. 
Thus the formula looks like: 2pr or pd.|dw:1382991065581:dw|