Answer :

Final answer:

Jeannetta, aged 10, with a mental age of 11, would have a Ratio IQ of approximately 110. This calculation is based on the formula used to calculate Ratio IQ, which is mental age divided by physical age, multiplied by 100. This IQ score indicates slightly above average cognitive abilities.

Explanation:

The Ratio IQ of a person is calculated by dividing their mental age by their physical age, and then multiplying this by 100. So for Jeannetta, who is 10 years old but has a mental age of 11, her Ratio IQ would be calculated like this: (11/10)*100 = 110.

Therefore, Jeannetta's ratio IQ is approximately 110. This value is within the typical IQ range (85-115) for the majority of the population. It indicates that Jeannetta's cognitive abilities are slightly above average for her age.

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