Mental Math Situation: You exercised 24 hours each month for a year. How many hours did you exercise by the end of the year? You
2 answers:
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Correct Answer:
Option A. 0.01
Solution:
This is a problem of statistics and uses the concept of normal distributions. We need to convert the score of 90 into z-score and then find the desired probability from standard normal distribution table.
Converting 90 to z-score:
Now we are to find the probability of z score being more than 2.33. From the z-table the probability comes out to be 0.01.
Therefore, we can conclude that the probability of class average is greater than 90 is 0.01.
Option A. 0.01
Solution:
This is a problem of statistics and uses the concept of normal distributions. We need to convert the score of 90 into z-score and then find the desired probability from standard normal distribution table.
Converting 90 to z-score:
Now we are to find the probability of z score being more than 2.33. From the z-table the probability comes out to be 0.01.
Therefore, we can conclude that the probability of class average is greater than 90 is 0.01.
Answer:
roses and
sunflowers
Step-by-step explanation:
Since the ratio of roses to sunflowers is , we can represent how many there are of each as
and
, respectively. We know that there are
more sunflowers than roses, so we can set up the following equation to solve for
:
Solving for , we get:
(Subtract
from both sides of the equation to isolate
)
(Simplify)
(Symmetric Property of Equality)
(Divide both sides of the equation by
to get rid of
's coefficient)
(Simplify)
Therefore, since , we know that there are
roses and
sunflowers. Hope this helps!