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andrew11 [14]
3 years ago
14

Use technology or a z-distribution table to find the indicated area.

Mathematics
1 answer:
katrin [286]3 years ago
8 0
Approximately 70% of the visitors to the theme park are older than about 12.3.

A z-score of about -0.53 is position on the normal distribution for finding the amount above 30% (70%).

Therefore, we can write and solve the following equation:

(x - 15) / 5.2 = -0.53
x - 15 = -2.756
x = 12.244

The closest amount is 12.3.
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