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What is the lowest temperature at which a fuel-air mixture will ignite in the presence of air and continue to burn?

The colored rods shown here are 1 centimeter square and of lengths 1​ cm, 2​ cm, 3​ cm, …, 10 cm. We say that a rod measures another rod if a number of the first rods placed end to end are the same length as the given rod.     Briefly describe how you might use these colored rods to demonstrate the notion of greatest common divisor​ (GCD) to children.

Perform the indicated operation.(-144) ÷ 8

Perform the indicated operation.(-7) ∙ (3) ∙ (-2)

Perform the indicated operation.(9) ∙ (5) ∙ (-7)

Perform the indicated operation.(-70) ÷ (-7)

66. All of the following family factors are associated with delinquency except ______.

58. In their general theory of crime, Gottfredson and Hirschi consider the criminal offender and the criminal act as _______concepts.

Solve the problem.The temperature at the South pole was -17° at 8 am. At 3 pm, it was 40°. By how many degrees did the temperature rise?

41. ________ is a concept in which more cohesive communities with high levels of social control and social integration foster the ability for kids to use their wits to avoid violent confrontations and to feel safe in their own neighborhood.