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

4 because 4 time 4 time 4 is equal to 64
Answer:
23%
Step-by-step explanation:
Answer:
X/2-7
Step-by-step explanation:
any number which is said to be less than another number let's say b should be subtracted from b.
Answer:- Option A "ray" is the right term which matches with the definition.
Explanation:-
A ray is a line that has one fixed endpoint, and extends infinitely along the line from the fixed endpoint.
Therefore, the term which matches with the given definition is "ray".
Thus A linear set of points with a unique starting point and extending infinitely in one direction is called a ray.