Question 7 (1 point) In a simple random sample of 80 electronic components produced by a certain
method, the mean lifetime was 922 hours. Assume that component lifetimes are
normally distributed with population standard deviation 103 hours. What is the
upper bound of the 95% confidence interval for the mean lifetime of the
components?
Round your answer to the nearest integer.

Yuto and hila attempted to solve the same inequality. their work is shown below. which statement is true about the work shown above? yuto is correct because he isolated the variable correctly and reversed the inequality symbol. yuto is incorrect because he should not have reversed the inequality symbol. hila is correct because she isolated the variable correctly and reversed the inequality symbol. hila is incorrect because she should not have reversed the inequality symbol.

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

Which of the following is not a subset of {1,2,3}?