What is the surface area of a sphere with a radius of 9 units? OA. 576 units2
OB. 648n units
OC. 288T units
OD. 324 units
m

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.