Consider .
Given:
To find:
The length of BC.
Solution:
We have,
We know that the corresponding parts of congruent triangles are congruent (CPCTC).
(CPCTC)
The length of BC is 5 m. Therefore, the correct option is A.
Officer Brimberry wrote 24 tickets for traffic violations last week, but only 15 tickets this week. What is the percent decrease
1 answer:
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Answer:
The standard deviation of weight for this species of cockroaches is 4.62.
Step-by-step explanation:
Given : A different species of cockroach has weights that are approximately Normally distributed with a mean of 50 grams. After measuring the weights of many of these cockroaches, a lab assistant reports that 14% of the cockroaches weigh more than 55 grams.
To find : What is the approximate standard deviation of weight for this species of cockroaches?
Solution :
We have given,
Mean
The sample mean x=55
A lab assistant reports that 14% of the cockroaches weigh more than 55 grams.
i.e. P(X>55)=14%=0.14
The total probability needs to sum up to 1,
The z-score value of 0.86 using z-score table is z=1.08.
Applying z-score formula,
Where, is standard deviation
Substitute the values,
The standard deviation of weight for this species of cockroaches is 4.62.