What is efficiency?
A.) using the maximum number of resources to produce goods and services
B.) replacing old ways of producing goods and services with new tools and methods
C.) using resources in such a way as to maximize the production of goods or services
D.) finding the most expensive, time-consuming way to produce a good or service

Why don't all places on earth receive the same amount of direct sunlight at the same place?

If you could drill a hole straight to the center of the earth, and keep track of what the hole is going through, youwould find: a) you would go through one sort of material, and then a different, denser material, and then a still-different, still-denser material, because the planet is made of concentric layers, sort of like an onion. b) you would go through one sort of material all the way to the center, because the planet is all mixed up. c) if your hole started at the north pole, you would go through different layers of different materials, but ifyour hole started at the equator, you would go through one sort of material all the way to the center. d) if your hole started at the equator, you would go through different layers of different materials, but if yourhole started at the north pole, you would go through one sort of material all the way to the center. e) you would strike diet pepsi when you got to the center.

Determine which of the two measurements in each set is lesser.10°f or 20°ca. 10-fb. 20°c