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The key word that should be used when describing different lava types is viscous, which essentially means how thick the lava is, with a high viscosity describing a very thick, slow-moving lava. Andesitic ...

Firstly we know that £1 equals 100p.

Then we could write 50p as £0.5 (As 50/100= 5/10= 1/2= 0.5), which is equivalent.

Now we do the fraction, £0.5 over £4, which is 0.5/4, enlarge both of t...