exam Maths Puzzle Numerical Ability

if an inventor charges $4 per unit then her profit producing and selling x units is given by the function P(x) = 2.25x - 7000
then what is her profit if she sells 2000 units?
wha

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exam Other Question

Suppose that the function P = 13+451n x represents the percentage of inbound email in the U. S. that is considered spam, where x is the number of years after 2000. Carry all calcualtions to six decimals on each intermediate step whne necessary. 3/(2x-1) is greater than -4/x