A guy bikes 15 miles in 1 hour, then rests for an hour. Then he bikes 25 in 2 hours. What was his average speed for the trip?

He went 15 miles/hour in the first sequence, and then 12.5 miles/hour (25 miles/2 hours) in the second sequence. If you take into account the hour he rested between segments: 15 miles/hour, 0 miles/hour, and 12.5 miles/hour. So (15+0+12.5)/3 = 9.17 miles/hour is his average. However, if you are not taking into account the whole trip, and only the time he was biking: (15+12.5)/2 = 13.75 miles/hour

an adaptation is a change or process by which an organism takes to be better suited for its environment. for example; migration is a behavioral adaptation, this is needed because birds are not built to last extremely cold climates. there are different adaptations because there are different species needing to adjust to different things, bears don't migrate; they hibernate.

sand 60

clay 10

silt 30

sandy loam should be dominated by the sand. as the amount of sand increased, the amount of slit needed to anchor the plants' roots to the sand will also be increased. even though the amount is very little, 10% part of clay is still necessary for proper oxidation.