exam Maths Puzzle Numerical Ability

Suppose and g(x) =Ln (3-x) Evaluate the following to 3 decimal places.
A. f(2.7) I have -1.204 B. g(-5) I have 2.079

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exam Other Question

Solve the following application.
Business and finance. The electricity costs of a business decreased from $12,000 one year to $10,920 the next. What is the rate of decrease? Is there origin symmetry for the rational function f(x)=4x/6x^2+1?
a. yes
b. no