(3.5x10^5)x(4x10^-3)=exponent form

What is the relation between concentration of reactants and the rate of chemical reaction?

How do scientists think that gravity affected the formation of our solar system?

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?