There has been a break-in at the local museum. Valuable artifacts have been stolen. Two windows have been breached and it is suspected that the perpetrator used a very tall ladder to enter or leave the museum through these windows. The authorities are hoping that learning more about this unusual ladder will provide clues to identify a suspect. Near the first window, two indentations were found on the ground 16 feet away from the base of the building. It is suspected that the feet of a ladder created these indentations. The first breached window is 30 feet high off of the ground. Investigators need to determine approximately how tall the ladder was.