In scientific notation, 8,700 is written:

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?