Astore owner buys cell phones of $40 dollars and marks up the price 25% how to find the price at witch she sells the cell phones

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

If 30 lb of rice and 30 lb of potatoes cost ? $27.60? , and 20 lb of rice and 12 lb of potatoes cost ? $15.04? , how much will 10 lb of rice and 50 lb of potatoes? cost?

(10. in the figure, a aabc is drawn tocircumscribe a circle of radius 3 cm ,such thatthe segments bd and dc are respectively oflength 6 cm and 9 cm. find the length ofsides ab and ac.