6+4-(4x2)+22^3=?? Can someone help!

Use this graph to find the cost of 6 show tickets

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.

Arational number that is equivalent to -20/4?