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Verdich [7]
3 years ago
14

Social Science predicts that the population of barre, Vermont will double every 54 years. If the population in 1974 was 56000, i

n what year should we expect the population to reach 71000
Mathematics
1 answer:
docker41 [41]3 years ago
7 0

Answer:

We should expect the population to reach 71000 in 1993.

Step-by-step explanation:

If the population will double every 54 years and the population in 1974 was 56000 people, then the function that represents this situation is

y=56000\cdot 2^{\frac{x}{54}},

where x is time in years since 1974.

Nota that in 1974, x=0, then y=56000 and after 54 years the population will be y=56000\cdot 2^{\frac{54}{54}}=56000\cdot 2=112000.

Therefore, you have to calculate x, when y=71000:

71000=56000\cdot 2^{\frac{x}{54}},\\ \\\dfrac{71}{56}=2^{\frac{x}{54}},\\ \\\dfrac{x}{54}=\log_2\dfrac{71}{56},\\ \\x=54\log_2\dfrac{71}{56}\approx 18.49

Thus, we should expect the population to reach 71000 in 1993 (after full 19 years).

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