Discover Questions

On the earth, 61 degrees of latitude is how many kilometers? how many miles? Assume that the radius of the earth is 6400 km, or 4000 mi? What is the maximum amount in moles of P2O5 that can theoretically be made from 112 g of O2 and excess phosphorus? Does anyone know how to verify that a magnifying glass is a certain X? Where can I find well formed quartz crystals in the mid western part of montana? near sanders county? Functions problem plus an explanation with the answer would really help so i know how to solve the next one?