The FBI selects a random sample of 1000 crime victims of either homicide, robbery, or assault and records whether the criminal was a stranger or an acquaintance of the victim. They want to know if the type of crime affects the likelihood of whether the victim knew the criminal or not.

1. are the triangles similar and if so why? what is the value of x? show your work.

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Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?