When you squeeze the rubber bulb of a perfume atomizer how do you change the air pressure at the top of the tube

The clock that rings the bell known as big ben has an hour hand that is 9.0 feet long and a minute hand that is 14 feet long, where the distance is measured from the center of the clock to the tip of each hand. part a what is the tip-to-tip distance between these two hands when the clock reads 12 minutes after four o'clock? express your answer using two significant figures.