Need to buy some filing cabinets. you know that cabinet x costs $10 per unit and requires six square feet of floor space. cabinet y costs $20 per unit and requires eight square feet of floor space. you have been given $140 for this purchase, though you don't have to spend that much. the office has room for no more than 72 square feet of cabinets. cabinet x provides 8 cubic feet of storage, and cabinet y provides 12 cubic feet of storage.

your answer is b hope that

since there isn't any suggested answers i will give you the reason and hopefully you can figure it

south africa, or rather all of africa, has not been in the location in which it is nowadays throughout the geological past. after the super-continent pangaea started to break apart, gondwanaland, in which was africa, moved further south, and parts of it came to be very close to the south pole. because the climate in this part of the world is very cold due to the very dispersed sun rays in there, what is now south africa, started to freeze, and the conditions were right for the formation of glaciers. the glaciers existed up until the period when gondwanaland started to break apart and what is now africa started to move towards north, sp it warmed up and the glaciers melted.