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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...

One thing to remember when writing philosophical essays is that it is very important to be as clear as possible. Let's face it, philosophy is difficult, full of categorical imperatives and hard problem...

The glomerulus is a knot of cappilaries inside the Bowman's capsule. The afferent arteriole (small blood vessel leading into the glomerulus) has a much larger diameter than the efferent arteriole (smal...

Reactivity increases down the group. The number of electron shells increases down the group. Therefore the outer electron is further away from the nucleus. Consequently, the attraction between the outer e...

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