Question

which of the contexts below represents exponential growth?
answer
snow was falling at a rate of 1.25 inches per hour.
a car depreciates at a rate of 5.3% per year.
a certain population of 32 aggressive zombies triples every hour.
a radioactive compound decays at a rate of 29% per hour.

Explanation:

• Snow falling at a constant rate (1.25 inches per hour) is linear growth, not exponential.
• A car depreciating (losing value) and a radioactive compound decaying are examples of exponential decay, not growth.
• A population of zombies tripling every hour means the population is multiplied by 3 (a constant factor) each hour, which fits the pattern of exponential growth (where the quantity increases by a constant percentage or factor over equal intervals).

Answer:

A certain population of 32 aggressive zombies triples every hour.