The circumference of a circle can be found using the formula C = 2tr.

the circumference of a circle is, 10.676 cm.

step-by-step explanation:

the formula for circumference of a circle is given by:

where

c is the circumference of a circle and

d is the diameter of a circle.

given: diameter(d) = 3.4 cm and use

substitute these values in [1] we get;

cm

therefore, the circumference of a circle is, 10.676 cm

is the anwser b. (-13)?

8p+(-9)

(-9)3p+5p and you can swith em around

sorry i do not     know the answer