What is the radius of this circle if the circumference is 18π cm?

c=18π cm

3 cm
9 cm
18 cm
36 cm

9 cm

Step-by-step explanation:

Circumference of a circle is given by

C = pi * 2 *r

18 pi = pi * 2 *r

Divide each side by pi

18 = 2 r

Divide each side by 2

18/2 = 2r/2

9 = r

The radius is 9 cm

the solution is h=10 because you add 9 to each side of the equation.

the inequality is:

250c+180g≥950

step-by-step explanation:

let c denotes the number of days in a week   miyoko worked as a cryptographer.

and g denotes the number of days in a week she works as a geologist.

now we are given that she earns $250 for every day she works as a cryptographer,and earns $180 for every day she works as a geologist.

now miyoko's goal is to earn more than $950 this week.

hence, the inequality could be represented as:

250c+180g≥950