This is a formula. s w is equal to bracket m 1 minus 1 end bracket times s 1 squared plus bracket m 2 minus 1 end bracket times s 2 squared over bracket m 1 minus 1 end bracket plus bracket m 2 minus 1 end bracket. This is equal to to bracket 20 minus 1 end bracket times 14.3178 squared plus bracket 20 minus 1 end bracket times 5.6835 squared over bracket 20 minus 1 end bracket plus bracket 20 minus 1 end bracket. This is equal to 118.6509.

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Last updated: 21 April, 2008.