At 12: 30 pm on august 2, the surface receives 789 wm−2 and reflects 110 wm−2. what is the surface albedo?

Albedo is the fraction of light that is reflected by a surface. Normally we use the term albedo to describe how reflective a planet or moon is. The albedo is on a scale from 0 to 1 with no units. An albedo of 0 means total absorption. An albedo of 1 means total reflection. To find the albedo, we divide the amount reflected by the total amount received. albedo = amount reflected / amount received albedo = 110 wm-2 / 789 wm-2 albedo = 0.139 The surface albedo is 0.139

So the question means
what(x) is (=) half of (1/2) 8.5
or x=8.5/2
so just do the math 8/2=4 and .5/2=.25 and 4+.25=4.24
x=4.25