What is the value of X I don’t understand this

What is the volume of the sphere shown below with a radius of 3?

In two or more complete sentences, formulate how to use technology to calculate the appropriate regression model for the given data. you are not required to find the model, just choose the appropriate regression and explain how to use the technology. (-5,,2.,0.8), (0,-0.5), (2,-1.3), (3,-0.8), (5,2)

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*