(Hypothetical.) At a large university, assume the average Math SAT score of all students is 450 with a standard deviation of 85. For a survey, we will randomly select 200 of the students. The expected value of the sum of the 200 students' scores is 450 with a standard error of 85 . The average student score is the sum of the scores, divided by the number of students. The expected value of the average of the 200 students' scores is with a standard error of .

Which expression is equivalent to 5r6141 2r+st6

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.

10x − 5y + 14 = 0 whats the answer pls