Answer:
Choice b.
Step-by-step explanation:
170 is a little more than half of 330 so that's the onee.
Answer:
a) 0.4164
Step-by-step explanation:
Mean lifespan (μ) = 18.8 days
Standard deviation (σ) = 2 days
For any given lifespan 'X', the z-score is:

For X=12.04 days:

A z-score of -3.38 falls in the 0.036-th percentile of a normal distribution.
For X=18.38 days:

A z-score of -3.38 falls in the 41.68th percentile of a normal distribution.
The probability that a butterfly lives between 12.04 and 18.38 days is

Step-by-step explanation:
(23/5)÷(-33/4)
multiply the first by the second reverse
23/5×4/-33
multiply the numerator between them and the denomination between them
92/-165
-0.558
Answer:
It is not well defined.
Step-by-step explanation:
Because set is a collection of well defined objet. And matter contains of solid, liquid and gas
Answer:
The answer is 45600 as 621 is less than 650 and should be rounded down.