Answer:
13b-12a+5 (so the last one)
Step-by-step explanation:
b-6a+12b-6a+5
13b-12a+5
Answer:0.212765957
Step-by-step explanation:
After clarification we see the respective diameters are


We're asked about the ratio

Now we can go through the choices.
A. If a = 4 and b = 6, then cell a is 100 times greater than cell b.

It would be more proper to say the diameter of cell A is 100 times the diameter of cell B, but yes, this is TRUE.
B. If a = 4 and b = 6, then cell b is 100 times greater than cell a.
FALSE. 10 to the minus 4 is 100 times bigger than 10 to the minus 6, so a is bigger.
C. If a = 4 and b = 6, then cell a is 2 times greater than cell b.
FALSE. We already calculated its 100 times bigger.
D. If a = 4 and b = 6, then cell b is 2 times greater than cell a.
FALSE.
252, 210 divided by 5 = 42, 42 x 5 = 210 + 42= 252
Answer: angle 2 is supplementary to angle 1