The average adult human has approximately 2.5 x 10' red blood cells and 7 x 10' white
blood cells. about how many times as great is the number of rea blood cells than the
number of white blood cells? write and solve an equation.

Step-by-step explanation:

I think your missing numbers are

RBC = 2.5 × 10¹³ and  

WBC = 7    × 10¹⁰

This is a ratio question.

You are asked to find the ratio of RBCs to WBCs.

Let r = the ratio.

Then the equation for the ratio is

Insert the values and do the division.

-7/8

step-by-step explanation:

instead of subtracting you add the -6/8 and -1/8