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The nth triangular number is given by: Tn = n(n + 1)/2 → T{14} = 14(14 + 1)/2 = 105
There are 2 values of scientific notation in the number given and they are:- 437100 = 4.371*105 in scientific notation 0.00000000006 = 6.0*10-11 in scientific notation
105 = 100,000 = one hundred thousand.
18% of 105= 18% * 105= 0.18 * 105= 18.9
12% of 105 = 12% * 105 = 0.12 * 105 = 12.6