The average score for 100 teenage boys playing a certain computer game was 90,000 points per player. If the standard deviation of the population is 25,000 points, find the 90% confidence interval of the mean score for all teenage boys.

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

Which expression is equivalent to 3^3 + 2^2?

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *