A bus traveled from the city A to the city B, which was 100 km away. Because of bad weather it moved 10 km/hour slower than it was scheduled and that's why it was late for 30 minutes. What was it's scheduled rate?

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.