Answer:
Explanation: We need to find the area of the triangle, We know that the area of any right triangle is:
Therefore in the information given we have the following:
Therefore the Area of this triangle is as follows:
Note! Units are centimeter-squared
A set of data has a normal distribution with a mean of 5.1 and a standard deviation of 0.9. Find the percent of data between 4.2 and 5.1.
Answer: The correct option is B) about 34%
Proof:
We have to find
To find , we need to use z score formula:
When x = 4.2, we have:
When x = 5.1, we have:
Therefore, we have to find
Using the standard normal table, we have:
=
or 34.13%
= 34% approximately
Therefore, the percent of data between 4.2 and 5.1 is about 34%