Ms. Grant saved $80 per month for 2 1/2 years while working part-time at a grocery store. She donated 20% of her total savings to a charity. How much of her total savings did Ms. Grant have left after making the donation?

The maximum distance (in nautical miles) that a radio transmitter signal can be sent is represented by the expression 1.23h√, where h is the height (in feet) above the transmitter. estimate the maximum distance x (in nautical miles) between the plane that is receiving the signal and the transmitter. round your answer to the nearest tenth.