1 176÷24=49

49× 1=49 (name)

A: There are 49 teachers.

(2)8+ 17+ 16+9=50

Zhao Jia: 100×8/50= 16 (yuan)

Qianjia: 100× 17/50=34 (yuan)

Sun Jia: 100× 16/50=32 (yuan)

Li family: 100×9/50= 18 (yuan)

(3)24×7= 168 (cm)

So c is a criminal.