exam Maths Puzzle Numerical Ability

Please help me select the correct window on my graphing calculator for this problem c(n)=2500 + (350n)

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exam Other Question

given this:

F(x)= 2x - 4
G(x)= 5 + x^2
K(x) = 7

Find F(1) + G(-2) + K(0)
what is the domain of the logarithmic function f(x)= log(7-x)