The farther a person is from a light bulb, the less intense its light. The equation 1=19/4d2 approximates the light intensity from a 60-watt light bulb at a distance of d meters, where 1 is measured in watts per square meter.
(A) Find 1 for d=2 meters and interpret the result.
(B) The intensity of light from a 100-watt light bulb is about 1 =32/ad2. Find an expression for the sum of intensities of light from a 100-watt bulb and a 60-watt bulb.