exam Maths Puzzle Numerical Ability

Write the function to show a collectable doll that has doubled in value in 10 years. The initial value of the doll was $355.00.
I think the answer is y=355(2)^x/10 . Am I correct

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exam Other Question
Select the point which is in the feasible region of the system of inequalities
4x+y is greater than or equal to 8
2x+5y is greater than or equal to 18
x is less than or equal to t/t-3+5/t+3=18/(t+3)(t-3)