Answer:
C complex
Step-by-step explanation:
a+ bi
a is the real part and bi is the imaginary part
Together they make a complex number
The last answer would be what your looking for !
Dont come for me if this is wrong, hoped I helped.
KINDEST REGARDS !
Answer: NO MODE(S)
explanation: In math mode is the most frequent number. In this case the numbers don't repeat again and that is why there is no mode.
Answer:
I believe your answer would be 
Step-by-step explanation:
Take 510, divide it by 30.
510/30 = 17
This means, every 17 red blood cells, there is 1 platelet, or 
Hope this helps! - Zac