How many grams of a 19.6% sugar solution contain 72.5 g of sugar?

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 ?

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude

If c + di is a point on the circle, then | c + di |=