I need an answer to this perplexing math problem!

6-8 (8+27)=?

Dr.cooper just started an experiment. he will collect data for 8 days. how many hours is this

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 360, a standard deviation of 4, and a margin of error of 2.5%

What is the length of the segment, endpoints of which are intersections of parabolas y=x2? 11 4 x? 7 4 and y=? 7 8 x2+x+ 31 8 ?