If the circumference of a spherical object is 43.96 cm, what is the surface area of the object? use 3.14 for pi im doing math with surface area fora sphere

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Asays "we are both knaves" and b says nothing. exercises 24–31 relate to inhabitants of an island on which there are three kinds of people: knights who always tell the truth, knaves who always lie, and spies (called normals by smullyan [sm78]) who can either lie or tell the truth. you encounter three people, a, b, and c. you know one of these people is a knight, one is a knave, and one is a spy. each of the three people knows the type of person each of other two is. for each of these situations, if possible, determine whether there is a unique solution and determine who the knave, knight, and spy are. when there is no unique solution, list all possible solutions or state that there are no solutions. 24. a says "c is the knave," b says, "a is the knight," and c says "i am the spy."

Anna is constructing a line segment that is congruent to another segment ab. for the construction, which tool should be used to mesure segment ab