What is the exact circumference of a circle with a radius of 17 mm?
8.5 mm
17* mm
34 mm
68 mm

Solution:

Given that,

A circle with radius 17 mm

To find: circumference of circle

The circumference of circle is given as:

Where, "r" is the radius of circle

Substitute r = 17 mm

Thus the exact circumference of a circle with a radius of 17 mm is or 106.76 mm

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72