Answer: The fourth option, 54°
Step-by-step explanation:
In the graph we can see that we have a triangle rectangle.
I will call each angle as the letter where it is located, the bottom angle is D, the upper left angle is C and the upper right angle is B (this last one is the angle we want to find)
This means that if the bottom angle, the angle located at D, is equal to 36°, we have that the angle located at C is equal to 90°.
And as you know, the sum of all the internal angles of a triangle must be equal to 180°, so we have:
D + C + B = 180°
90° + 36° + B = 180°
B = 180° - 90° - 36° = 54°
The correct option is the fourth one.
Firstly, we have to find the mean. The mean is simply the average of the numbers, which we find by adding each number in the sequence and then dividing that result by the total amount of numbers.
<em>13.3 + 14.3 + 15.3 + 16.3 + 17.3 = 76.5</em>
<em>76.5 / 5 = 15.3
</em>Okay, so our average is 15.3.
<em>
Now, </em>we have to subtract the mean from each number and then square the result.
<em>(13.3 - 15.3)^2 = 4</em>
<em>(14.3 - 15.3)^2 = 1</em>
<em>(15.3 - 15.3)^2 = 0</em>
<em>(16.3 - 15.3)^2 = 1</em>
<em>(17.3 - 15.3)^2 = 4
</em>Now we have to find the mean of those numbers!
<em>
4 + 1 + 0 + 1 + 4 = 10
10 / 2 = 2
</em>Finally, we take the square root of that number and we have our standard deviation. =)<em>
</em>
Nico because 1 cm equals 10 mm, so Jake’s thumb is only 5.5 cm.
