Someone please help me

What is 140% of 25? because i need

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.

Graph the system of equations. { x-y=6 4x+y=4use the line tool to graph the lines. where do i put each point?