a computer cost $1099 last year cost $999 this year what's the percent of change in price rounded to the nearest tenths

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

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

Ineed on the last 8 questions for this homework i’m trying to get all this done by tuesday when i got to my level 5 teacher if i have passed my tabe