How do you solve for slope intercept form and point slope form?

8th grade math

What is the arc length when θ =pi over 3 and the radius is 5 cm? (5 points) 5 pi over 3 cm 10 pi over 3 cm 16 pi over 3 cm pi over 3 cm

Need on this one asap im almost done with this subject

Solutions for 2x+7 less than or equal to 3x-5