Answer:
The measures of the angles at its corners are ![59.1\°,35.4\°,85.5\°](https://tex.z-dn.net/?f=59.1%5C%C2%B0%2C35.4%5C%C2%B0%2C85.5%5C%C2%B0)
Step-by-step explanation:
see the attached figure to better understand the problem
step 1
Find the measure of angle A
Applying the law of cosines
![185^{2}= 215^{2}+125^{2}-2(215)(125)cos(A)](https://tex.z-dn.net/?f=185%5E%7B2%7D%3D%20215%5E%7B2%7D%2B125%5E%7B2%7D-2%28215%29%28125%29cos%28A%29)
![2(215)(125)cos(A)= 215^{2}+125^{2}-185^{2}](https://tex.z-dn.net/?f=2%28215%29%28125%29cos%28A%29%3D%20215%5E%7B2%7D%2B125%5E%7B2%7D-185%5E%7B2%7D)
![cos(A)= [215^{2}+125^{2}-185^{2}]/(2(215)(125))](https://tex.z-dn.net/?f=cos%28A%29%3D%20%5B215%5E%7B2%7D%2B125%5E%7B2%7D-185%5E%7B2%7D%5D%2F%282%28215%29%28125%29%29)
![cos(A)=0.513953](https://tex.z-dn.net/?f=cos%28A%29%3D0.513953)
![A=arccos(0.513953)=59.1\°](https://tex.z-dn.net/?f=A%3Darccos%280.513953%29%3D59.1%5C%C2%B0)
step 2
Find the measure of angle B
Applying the law of cosines
![125^{2}= 215^{2}+185^{2}-2(215)(185)cos(B)](https://tex.z-dn.net/?f=125%5E%7B2%7D%3D%20215%5E%7B2%7D%2B185%5E%7B2%7D-2%28215%29%28185%29cos%28B%29)
![2(215)(185)cos(B)= 215^{2}+185^{2}-125^{2}](https://tex.z-dn.net/?f=2%28215%29%28185%29cos%28B%29%3D%20215%5E%7B2%7D%2B185%5E%7B2%7D-125%5E%7B2%7D)
![cos(B)= [215^{2}+185^{2}-125^{2}]/(2(215)(185))](https://tex.z-dn.net/?f=cos%28B%29%3D%20%5B215%5E%7B2%7D%2B185%5E%7B2%7D-125%5E%7B2%7D%5D%2F%282%28215%29%28185%29%29)
![cos(B)=0.81489](https://tex.z-dn.net/?f=cos%28B%29%3D0.81489)
![B=arccos(0.81489)=35.4\°](https://tex.z-dn.net/?f=B%3Darccos%280.81489%29%3D35.4%5C%C2%B0)
step 3
Find the measure of angle C
Applying the law of cosines
![215^{2}= 125^{2}+185^{2}-2(125)(185)cos(C)](https://tex.z-dn.net/?f=215%5E%7B2%7D%3D%20125%5E%7B2%7D%2B185%5E%7B2%7D-2%28125%29%28185%29cos%28C%29)
![2(125)(185)cos(C)= 125^{2}+185^{2}-215^{2}](https://tex.z-dn.net/?f=2%28125%29%28185%29cos%28C%29%3D%20125%5E%7B2%7D%2B185%5E%7B2%7D-215%5E%7B2%7D)
![cos(C)= [125^{2}+185^{2}-215^{2}]/(2(125)(185))](https://tex.z-dn.net/?f=cos%28C%29%3D%20%5B125%5E%7B2%7D%2B185%5E%7B2%7D-215%5E%7B2%7D%5D%2F%282%28125%29%28185%29%29)
![cos(C)=0.0784](https://tex.z-dn.net/?f=cos%28C%29%3D0.0784)
![C=arccos(0.0784)=85.5\°](https://tex.z-dn.net/?f=C%3Darccos%280.0784%29%3D85.5%5C%C2%B0)
15!!! is the answer to your question:)
Notice this is a geometric progression since each number multiplied by some factor equals the next number in the sequence, in this case,
![10 \times r = 5 \Rightarrow r=0.5](https://tex.z-dn.net/?f=10%20%5Ctimes%20r%20%3D%205%20%5CRightarrow%20r%3D0.5)
Then by applying the formula for sum to infinity of a geometric progression,
Answer:
<em>B. 11 - 6 = 5</em>
Step-by-step explanation:
Median: 9.5
Lower Quartile: 6
Upper Quartile: 11
Interquartile Range: upper quartile - lower quartile = answer
Answer:
Step-by-step explanation: