How do you write 250,000 in expanded notation using exponents?

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 25, a standard deviation of 2.5, and margin of error of 5%