If log102 0 3010 and log107 0 8451 evaluate log... - JAMB Mathematics 2009 Question
If log102 = 0.3010 and log107 = 0.8451, evaluate log10280.
A
3.4471
B
2.4471
C
1.4471
D
1.4071
correct option: b
log10(10 x 7 x 4)
log10280 = log1010 + log107 + 2 log 2
= 1 + 0.8451 + 2(0.3010)
= 2.4471
log10280 = log1010 + log107 + 2 log 2
= 1 + 0.8451 + 2(0.3010)
= 2.4471
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