Question: 1) A person's intelligence quotient ( I ) is found by dividing mental age ( M ), as indicated by standard tests, by chronological age

1) A person's intelligence quotient (I) is found by dividing mental age (M), as indicated by standard tests, by chronological age (C) and then multiplying this ratio by 100. The formulaI=100M

can be used. If theIrange of a group of9-year-olds is given by70I140, find the range of the mental age of this group.

The range isyears (smaller value) toyears (larger value).

2)Solve the compound inequality and graph the solution set.

x+8>1andx+8<1

Express the solution set in interval notation.

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