Answer: The number of red blood cells is approximately 660 times greater than white blood cells.
Step-by-step explanation: In adult humans the blood has about 4,5 to 6 million red blood cells per cubic millimeter (mm3), while the normal value of white blood cells is between 5,000 and 10,000 per mm3.
The slope is -4 because y is always the slope
Middle school math! I actually know how to teach differential calculus to middle schoolers, but I wouldn't start with this example, where we're gonna have to integrate eventually.
We have

We have an odd mix of s and t on the right, which means this probably was an implicit derivative to begin with. In other words, instead of s as a function of t, we have some equation of s and t that is satisfied.
We move the variables to their respective sides

Integrating,

We only need one constant of integration.
I won't bother to write the square root. This is choice D.