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How many thirds are there in 8? a)3 b)24 c)9 d)22 e)4

b)243*8=24
TH
Answered by Tom H. Maths tutor
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a) Give an example of an alpha radiation source used in homes b) Why is it safe to use a source of alpha radiation in the house

a) Smoke detector- americiumb) As alpha radiation is not very penetrating
Answered by Physics tutor
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Explain why you would like to study medicine as opposed to nursing?

Why medicine? - Answer with examples like i want to apply more scientific principles to my work, I would like a greater understanding of the physiology and disease processes, diagnosis focused, use specific ...
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Print "Hello World!" ten times without typing (or pasting) the print function more than once

n=0for n in range(0,10): print('Hellow World!') n=n+1 #or n+=1#
Answered by Python tutor
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In the expansion of (x-7)(3x**2+kx-3) the coefficient of x**2 is 0. i) Find the value of k ii) Find the coefficient of x. iii) write the fully expanded equation in terms of x

i) multiply out: 3x 3+kx 2-3x-21x 2-7kx+21 simplify: 3x 3+(k-21)x 2+(-7k-3)x+21 the coefficient of x 2 is 0 and therefore k-21=0 k=21. ii)from i) the coefficient of x is (-7k-3) k=21 and therefore the requir...
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