Which element makes up 1/400 of the human body

Can someone 50 first drop menu 0.80 or 0.75 or 1.20 or 4.00 second drop menu 4.00 or 0.75 or 0.25 or 3.75 3rd 15,6,10, or 9 4th yes or no

Closing a credit card usually _your debt ratio.a. increasesb. decreasesc. improvesd. has no effect on

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"