exam Maths Puzzle Numerical Ability

please tell me proper steps to solve the following problem:-
e^x where x=.31467 and x=.44673

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exam Other Question

54. If the inventor in exercise 53 charges $4 per unit, then her profit for producing and selling x units is given by the function P(x) = 2.25x - 7000.

(a) What is her profit if
Find the slope and y-intercept of the equation


y = 1/2x - 4