Un grupo de bacterias decrece exponencialmente a un quinto de su población cada día. ¿Qué expresión REPRESENTA cuántas bacterias quedarán al cabo de 5 días si inicialmente hay 12 bacterias? A) 12 • 5 ^-5
B) - 5 ^12
C) 5 • 12 ^5
D) 12 • 5 ^5

Acompany manufactures three types of cabinets. it makes 110 cabinets each week. in the first week, the sum of the number of type-1 cabinets and twice the number of type-2 cabinets produced was 10 more than the number of type-3 cabinets produced. the next week, the number of type-1 cabinets produced was three times more than in the first week, no type-2 cabinets were produced, and the number of type-3 cabinets produced was the same as in the previous week.