exam Maths Puzzle Numerical Ability

Solve:

3(-5 + 4p) - (-(-2 2nd power))p = -5p(-3 to 0 power - (-1) 3 power) -/-9/

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exam Other Question

If the inventor in exercise 53 charges $4 per unit, the her profit for producing andselling x units is given by the function p(x)=2.25x -7000
(a) what is her profit if she sells 2 There are currently 50 million cars in a certain country, decreasing by 4.9% annually. How many years will it take for this country to have 27 million cars? Round to the nearest year.