Take $293 and multiply that by his percentage .15. 293 x .15 = $43.95. So he earned $43.95 in commission for that laptop.
Ecosystem includes all of the biotic and abiotic factors that are found in a given environment. Biome is a collection of different ecosystems which share similar climate conditions.
I'm no dure but i think you are tring to ask for x 5x+2miles 25x-8 miles long
