Q1. A person eats a dessert that contains 26o Calories. This skin temperature of this individual is 38 degrees Celsius and that of her environment is 21 degrees Celsius. The emissivity of her skin is 0.77 and its surface area is 1.5 meters squared. How much time would it take for her to emit a net radiant energy from her body that is equal to the energy contained in this dessert?

Q2. A bridge equation of the for h=ax^2+b where h is the height of the bridge in meters and x is the distance from the middle of the bridge in meters. The letters A and B are constants. When x=0, the bridge's height is 80 meters; and when the x=300, its height is 0 meters.

How long is the bridge? Write down an equation for the bridge's height. And how far from the center of the bridge are two points if bridge's height at those points is 80 meters.