Can someone help me pls

Determine the volume of a cylinder bucket if the diameter is 8.5 in. and the height is 11.5 in.

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

One of every 20 customers reports poor customer service on your company’s customer satisfaction survey. you have just created a new process that should cut the number of poor customer service complaints in half. what percentage of customers would you expect to report poor service after this process is implemented? 1.) 5% 2.) 10% 3.) 2% 4.) 2.5%