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So we know the formula for the area of a circle: πr² 

So all we need to find is the radius²

Radius = Diameter / 2 (Half the diameter)  

            = 70

R...

First put in columns for units, tens, and hundreds. Then count the number of postions between the decimal point and the first digit ( on the left).      H|T|U 2 7 6 4 0 0 0 6 5 4 3 2 1 This is number the ...

Percentage change isn't always as simple as you think. Whilst taking into consideration if it is a percentage increase or decrease, you also need to consider whether you're calculating a result before or ...

The distribution of heads on a biased coin will be binomial - there are only two possible outcomes for a given throw (disregarding the coin standing upright after a toss). Thus X ~ B(600, 0.4) - where X i...

To solve this equation we cant use the PSF method, as nothing multiplies to -8 and adds to -6. (Also in the question it says the answer will be in a±b which is normally what you get when you can't factori...