I need help please

Can be categorized as popularity, relevancy, and user satisfaction. select one: a. mobile search seo b. ranking factors c. serp d. web analytics

What characteristic of long period comets suggest they come directly from the oort cloud?

Let r be a robotic arm with a fixed base and seven links. the last joint of r is a prismatic joint, the other ones are revolute joints. give a set of parameters that determines a placement of r. what is the dimension of the configuration space resulting from your choice of parameters?