What is the surface area of this triangular pyramid?
2 answers:
<em>40.75 m^2</em>
Step-by-step explanation:
The formula for the surface area of a pyramid is:
Since B is the area of the base, we will find the area of the base first. In this case, the base is a triangle.
The formula for the area of a triangle is:
A = 10.75
Now that we have the value of B, we can plug everything into the equation and solve. The cursive L, which means the lateral height, is 4. The number of base sides is 3, which you can just count. Lastly, the base is 5, which is the side of the base triangle.
40.75 m^2
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Answer:
Five classes
Step-by-step explanation:
1. Sort the data
You get
1.1, 1.3, 1.6, 1.7, 2, 2.6, 2.7, 2.9, 3.2, 3.2, 3.5, 3.5, 3.9, 4.6, 4.7, 4.8, 4.8, 4.9, 4.9, 5.3, 5.7, 6.4, 6.5, 7.1, 7.5, 7.6, 8.1, 8.2, 9.2, 9.4
2. Calculate the range
Range = Max - Min = 9.4 - 1.1 = 8.3
3. Calculate the class width
Divide the range by the number of classes
8.3/5 = 1.7
Round this up to 2.
4. Decide where to start the histogram
You could use classes: 1 - 3, 3 - 5, 5 - 7, 7 - 9, 9 -11
However, even numbers are easier to read.
It would be preferable to use classes: 0 - 2, 2 - 4, 4 - 6, 6 - 8, 8 - 10
5. Prepare a frequency distribution table
Note: Each class does not include its largest possible value. Thus, a value of 2 goes into Class 2 - 4, (not Class 0 - 2).