Find the unknown length given that the triangles are similar. show your work

Complete the statements about the system of linear equation respresented by the tables the equation respented the left table is

When turned about its axis of rotation, which shape could have created this three-dimensional object?

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a. about 4 b. about 8 c. about 40 d. about 21