the justice leagues refrigerator costs them $2545 a year to run. they buy a new one for $1250 that will save them 21% annually in energy costs to run it. how many years will it take for the savings to pay for the new refrigerator

Organisms that live in the alpine and taiga biomes have developed unique adaptations that aid in their survival. the douglas-fir is a conifer tree that grows in the taiga biome. it has an average height of about 70 feet, and its wood is an important source of lumber.

What are the first 4 terms in the multiplication pattern given by the formula 2×4n

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?