Step-by-step answer:
Referring to the attached diagram, the resultant of two forces each with magnitude F and inclined to each other at 2a equals
Ra = 2Fcos(a) ..............................(1)
Similarly, the resultant of two forces each with magnitude F and inclined to each other at 2b equals
Rb = 2Fcos(b)..............................(2)
We are given that
Ra = 2Rb ....................................(3)
Substitute (1) & (2) in (3) gives
2Fcos(a) = 2(2Fcos(b))
Expand
2Fcos(a) = 4Fcos(b)
Simplify
cos(a) = 2 cos(b) QED
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Answer:Not true
Step-by-step explanation:12 is divisible by 3, and 12 is even.
"97.5" will be the American women's % having their shoe sizes that are no more than 11.33.
Given values are:
- Mean = 8.33
- Standard deviation = 1.5
Now,
= 
= 
(2 above Standard deviation)
→ The data values are between 8.33 and 11.33,
= 
= 
(%)
→ The data value below 11.33,
= 
(%)
hence,
→ The percentage of American women will be:
= 
= 
(%)
Thus the above answer is appropriate.
Learn more about empirical rule here:
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9514 1404 393
Answer:
20
Step-by-step explanation:
This triangle is your basic 3-4-5 triangle multiplied by 5 to become a 15-20-25 triangle. The missing leg is 20.
_____
More at brainly.com/question/23176381
If domestic vehicles outnumber foreign vehicles by about three to two and vehicles in a country are 1925 then Domestic vehicles would be {(1925)x(3/5)} = 1155
