At the corner store, nico bought 5 pencils for $0.10 each and 3 pens for $0.50 each. he used t to represent the sales tax, in dollars, that he also paid. he paid a total of $2.12, including tax. nico wrote this equation to represent what he paid. what errors, if any, did he make? 5(0.10) + 3(0.50) - t = 2.12

Twelve different video games showing substance use were observed and the duration times of game play (in seconds) are listed below. the design of the study justifies the assumption that the sample can be treated as a simple random sample. use the data to construct a 99% confidence interval estimate of μ, the mean duration of game play. 4028 4316 4816 4650 4036 5010 4833 4331 4307