Answer:
It's C.
Explanation:A squared plus b squared equals c squared, then square root the c value to get your answer
So A=18 and B=24 right? But C, the diagonal length of the table is unknown. If we split the table into two triangle instead of a rectangle, the diagonal length becomes a missing side. So now you can do 18^2 + 24^2 = C^2 or 324+576=900 square rooted. or 30.
Answer:
Electronic measurement tools accurately store a large volume of data very quickly.
Explanation:
Electronic measurement tools are important devices used in taking records of data. They are very good measuring tools because they can measure a large amount of data very quickly and in a very precise manner. Examples include; multimeters, voltmeters, oscilloscopes, etc.
Their sizes might vary but a general attribute to them all is the speed at which data is recorded and the precision with which they are measured. Scientists most times use these devices to take measurements.
Finding the new mean is simple: If ![E[X]=10](https://tex.z-dn.net/?f=E%5BX%5D%3D10)
, then ![E[2X]=2E[X]=20](https://tex.z-dn.net/?f=E%5B2X%5D%3D2E%5BX%5D%3D20)
.
Meanwhile, the standard deviation is the square root of the variance, which is given by
![V[X]=E[X^2]-E[X]^2\implies V[2X]=E[(2X)^2]-E[2X]^2=4E[X^2]-(2E[X])^2](https://tex.z-dn.net/?f=V%5BX%5D%3DE%5BX%5E2%5D-E%5BX%5D%5E2%5Cimplies%20V%5B2X%5D%3DE%5B%282X%29%5E2%5D-E%5B2X%5D%5E2%3D4E%5BX%5E2%5D-%282E%5BX%5D%29%5E2)
![\implies V[2X]=4\underbrace{\left(E[X^2]-E[X]^2\right)}_{V[X]}=12](https://tex.z-dn.net/?f=%5Cimplies%20V%5B2X%5D%3D4%5Cunderbrace%7B%5Cleft%28E%5BX%5E2%5D-E%5BX%5D%5E2%5Cright%29%7D_%7BV%5BX%5D%7D%3D12)
and so the new standard deviation would be ![\sqrt{V[2X]}=\sqrt{12}=2\sqrt3](https://tex.z-dn.net/?f=%5Csqrt%7BV%5B2X%5D%7D%3D%5Csqrt%7B12%7D%3D2%5Csqrt3)
.
