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A group consisting of 23 aggressive zombies triples in size every hour. Which equation matches the number of zombies after 2 hours?

Z=23(3)^(2)

Z=3(1+23)^(2)

Z=23(1+3)^(2)

Z=3(23)(23)

A group consisting of 2323 aggressive zombies triples in size every hour. Which equation matches the number of zombies after 22 hours?\newlineZ=23(3)2 Z=23(3)^{2} \newlineZ=3(1+23)2 Z=3(1+23)^{2} \newlineZ=23(1+3)2 Z=23(1+3)^{2} \newlineZ=3(23)(23) Z=3(23)(23)

Full solution

Q. A group consisting of 2323 aggressive zombies triples in size every hour. Which equation matches the number of zombies after 22 hours?\newlineZ=23(3)2 Z=23(3)^{2} \newlineZ=3(1+23)2 Z=3(1+23)^{2} \newlineZ=23(1+3)2 Z=23(1+3)^{2} \newlineZ=3(23)(23) Z=3(23)(23)
  1. Understand the problem: Understand the problem.\newlineWe need to find the equation that correctly represents the number of zombies after 22 hours, given that the initial number of zombies is 2323 and the population triples every hour.
  2. Determine base number and rate: Determine the base number of zombies and the rate of growth.\newlineThe base number of zombies is 2323, and the rate of growth is tripling every hour, which is a multiplication by 33.
  3. Apply exponential growth formula: Apply the exponential growth formula.\newlineThe general formula for exponential growth is Initial Population×Growth RateTime Period\text{Initial Population} \times \text{Growth Rate}^{\text{Time Period}}. In this case, the Initial Population is 2323, the Growth Rate is 33, and the Time Period is 22 hours.
  4. Plug values into formula: Plug the values into the formula to get the equation.\newlineZ=23×32Z = 23 \times 3^{2}
  5. Evaluate options: Evaluate the options given in the problem to see which one matches our equation.\newlineOption A: Z=23(3)2Z = 23(3)^{2} matches our equation from Step 44.\newlineOption B: Z=3(1+23)2Z = 3(1+23)^{2} does not match because it suggests adding 11 to 2323 before raising to the power of 22.\newlineOption C: Z=23(1+3)2Z = 23(1+3)^{2} does not match because it suggests adding 11 to 33 before squaring, which is not the correct growth rate.\newlineOption D: Z=3(23)(23)Z = 3(23)(23) does not match because it suggests multiplying 2323 by itself, which is not the correct growth pattern.

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