Firstly, observe the function f(x)=-2^x, this function is decreasing and negative (below the x-axis) over its domain.
At the same time, consider the function h(x)=1-x² over the interval 0 ≤ x≤1. this function is decreasing over the said interval. However, it is not negative.
Therefore, a function doesn´t need to be negative over the interval it is decreasing on.
A googol is 1.0*10^100. there are <span>25000000000 RBC in the average adult. The number of adults equals 1.0*10^100 / </span><span>25000000000 =</span>400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 (=10^100/(25*10^9)=4*10^89)
