William stern's formula for the intelligence quotient was mental age/chronological age ã— 100. what is the iq of a 12-year-old with a mental age of 9? a. 125 b. 135 c. 75 d. 85

William Stern's formula for the intelligence quotient was mental age/chronological age × 100. What is the IQ of a 12-year-old with a mental age of 9?

c. 75

gold discovery in california, and pioneer settlers were sometimes pulled west because they wanted to make a better living. others received letters from friends or family members who had moved west. these letters often told about a good life on the frontier. the biggest factor that pulled pioneers west was the opportunity to buy land.

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