In a sample of 50 households, the mean number of hours spent on social networking sites during the month
of January was 45 hours. In a much larger study, the standard deviation was determined to be 8 hours.
Assume the population standard deviation is the same. What is the 95% confidence interval for the mean
hours devoted to social networking in January?

Consider the function f(x)=−2/3x+5 . what is f(1/2) ? enter your answer, as a simplified fraction, in the box. f(1/2)=

The sum of two numbers is 58. the first number is 8 less than half the second number. let  c  represent the first number. let  drepresent the second number. which statements about solving for the two numbers are true? check all that apply.the equation    represents the sum of the two numbers.the equation    represents the sentence “the first number is 8 less than half the second number.”the equation    represents the relationship between the two numbers.the equation    represents the sum of the two numbers.the number  d  is 14.the number  c  is 44.the number  c  is 14.the number  d  is 44.

Consider the diagram. which line segment has the same measure as st? rx tx sr xs