What is the circumference of the circle?

What is not true about kl and mn? what is mn? (show your work)

Draw a tape diagram to represent each situation.for some of the situations,you need to decide what to represent with a variable andre bakes 9 pans of brownies.he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students

What is the lcm of 16 and 40 ? 24 and 40 ?