PLEASE HELP!! If you answer pls explain I need to know if I ever have a problem like dis in the future
What is the volume of a cylinder with a height of 3 feet and a radius of 4 feet?

Use 3.14 for pi.
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Aaron invested a total of $4,100, some in an account earning 8% simple interest, and the rest in an account earning 5% simple interest. how much did he invest in each account if after one year he earned $211 in interest? select one: a. $200 at 8%, $3,900 at 5% b. $3,200 at 8%, $900 at 5% c. $900 at 8%, $3,200 at 5% d. $3,900 at 8%, $200 at 5%