What is the circumference of a circle that's radius is 11.8​

What is the area of a pizza with a radius of 40 cm leave the answer in terms of π to find your exact answer 40π cm² 1600π cm² 800π cm² 80π cm² π=pi

Need on this one asap im almost done with this subject

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.