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RideAnS [48]
3 years ago
12

What was the first year that the amusement park had more than 12 million visitors?

Mathematics
1 answer:
SVETLANKA909090 [29]3 years ago
8 0

Answer:

The first year that the amusement park had more than 12 million visitors is 2008.

Step-by-step explanation:

Given:

y=4.2\sqrt{0.28x-1}

As per the question, the number of visitors must be greater than 12 million.

So, y>12

Plug in 4.2\sqrt{0.28x-1} for y and solve for x.

4.2\sqrt{0.28x-1}>12

\sqrt{0.28x-1}>\frac{12}{4.2}\\0.28x-1>(\frac{12}{4.2}) ^{2} \\0.28x>8.16+1\\x>\frac{9.16}{0.28} \\x>32.7\\

Therefore, least value of x for which the number of visitors are more than 12 million is x=33.

Since, x is measured after 1975.

Therefore, the first year that the amusement park had more than 12 million visitors is 1975+x=1975+33=2008.

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