How do you find the area of a pentagon if only given the radius?

Place the following steps in order to complete the square and solve the quadratic equation,

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

Which inequality statement describes the two numbers on a number line? "? 7 and a number 5 units to the right of ? 7"