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In the atomic structure of diamond, each carbon is bonded to four other carbons using all of its outer electrons, leaving none free to carry a charge. In graphite not all of the electrons are used in bond...

Shop A:30%=0.31-0.3=0.715x0.7=10.5 --> now £10.50 in Shop A
Shop B40%=0.41-0.4=0.617x0.6=10.2 --> now £10.20 in Shop B
£10.50-£10.20=£0.30=30p
The t-shirt is now cheaper in Shop B by ...

Warm colours are often used to connote positive emotions, for example yellow can be associated with happiness and red with love and affection. However, depending on the meaning of the piece they can also ...

Mean = Sum of all the numbers/How many numbers there are60=sum of all numbers/30 therefore 1800= sum of all the test scores of class54= sum of all the girls' scores/20 therefore 1080 = sum of all the girl...

There are two possible outcomes in which all beads are the same colour: they may be all green, or all black. We need to work out the probability of each outcome to start with. This is done by multiplying ...