I am very confused on this problem pls help

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

What number line represents the solution set for the inequality -1/2 greater than or equal to 4

Last month, leonhard euler's watch kiosk at the mall had total sales of $9,489. merchandise totaling $225 was returned. the goods that were sold cost leonhard euler's $5,481. operating expenses for the moth were $992. what was the gross profit on sales?