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There are two ways you can take the derivative of a^x.

1) 

Let y = a^x    now we're trying to find dy/dx

2)

ln(y) = xln(a)    take logs of both s...

To find the gradient of a straight line we can use the change in the X and Y directions.

The gradient (Slope) of a straight line is defined as :

​Grad = (Change in Y) / (Cha...

The full price (100%) is £4The sale price is 30% less. So the sale price is 70% of the original price.£4 * 0.7 = £2.80

There are different types of averages: the MEAN, the MEDIAN and the MODE. The mean average is where we add all the numbers up together and divide by the amount of numbers provided. So for this case, we...

You know that when working out the area of a square or rectangle you do width X height. 

We know a triangle is always half of a square or rectangle, so you work out the width and height a...