Alex measured the length of his sofa. he reported the length as 7 feet, accurate to the nearest foot. The actual length of the sofa must be
O exactly 7 feet.
O at least 7 feet.
O at least 6.5 feet and less than 7.5 feet
O at least 6.9 feet and less than 7.1 feet.
Oat least 6.99 feet and less than 7.01 feet.