Acoat usually cost 123 but is marked 1/3 off

Simplify using positive exponents only.

What is the simplified form of square root of 400 to the 100th power ?

The line plot below represents the number of letters written to overseas pen pals by the students at the waverly middle school. each x represents 10 students. how many students wrote more than 6 and fewer than 20 letters. a.250 b.240 c.230 d.220