What is the symbol of an element give answer​

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

Which substance is a steroid? cholesterol fatty acid monosaccharide trans fat