Which values of x satisfy the inequality 0.5x-0.75 is greater than or equal to 3.25

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?

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