If you look at the model RM is the same length as PM. PM=10 so RM=10.
Answer: 34%
Step-by-step explanation:
Given : The distribution of the number of daily requests is bell-shaped and has a mean of 59 and a standard deviation of 7.
i.e. and
According to the 68-95-99.7 rule, about 68% of the population lies in one standard deviation from the mean.
About 34% of the population lies one standard deviation above the mean and About 34% of the population lies one standard deviation below the mean.
For the given situation, 34% of lightbulb replacement requests lies one standard deviation below the mean .
i.e.About 34% of lightbulb replacement requests lies between and .
i.e. About 34% of lightbulb replacement requests lies between and .
i.e. About 34% of lightbulb replacement requests lies between and .
Hence, the approximate percentage of lightbulb replacement requests numbering between 52 and 59 = 34%
Given:
Since R is the midpoint of the line, we can set XR equal to RY and solve for x.
Now we know what x is. We can plug in x to RY and XR and then add it all together to find XY. Let's find XR:
Let's find RY now:
Since we know that:
We can plug in our answers:
Final answer:
Step-by-step explanation:
90:120
9:12
3:4
Topic: ratio n proportions
If you like to venture further, do check out my insta (learntionary) where I constantly post math tips! Thanks!