exam Maths Puzzle Numerical Ability

it says write an equation for a hyperbola with vertices at (0,7) (0,-7) and foci at (0,9)(0,-9)

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exam Other Question

Suppose you are at the gas station filling up your tank with gas. The function
C(g) represents the cost of gas and g the gallons C(g)=3.03(g)

If you were to graph C(g) what would be an appropraite domain? Range? solve and graph the solution set. x+3>-7