Write this number in standard form 4,000,000+300,000+10,000+500+30+7

The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). the mean maximum oxygen uptake for elite athletes has been found to be 60 with a standard deviation of 7.2. assume that the distribution is approximately normal.

Factor the polynomial expression x6 – x3 – 20

What is the answer to this problem? ignore the work. what is the correct answer?