Two rectangles are similar with a scale factor of 4/7. If the area of the larger rectangle is 294 in2 , find the area of the smaller rectangle

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?