Use the associative property to simplify the expression. 43 + 30 + 70 O A. 43 + 10(3 + 7) = 43 + 10(10) = 143 OB. 43 + (30 + 70) = 43 + 100 = 143 O C. 43 + 30 + 70 = 73 + 70 = 143 O = D. 43 + 70 + 30 = 113 + 30 = 143

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step-by-step explanation:

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2b2t

explanation:

2b2t

the formula for converting absorbance to transmittance goes as:

a = log (1/t)  a = 2 - log(%t)  10^a = 1/t  t = 10^-a  %t = 100(10^-a)

so at the given value of a,   a = 1.5

%t = 100(10^-1.5)

%t = 3.16%