# Tutor profile: Sue L.

Sue L.

Tutor

## Questions

### Subject: Java Programming

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Question:

What is the difference between ArrayList and LinkedList in Java?

Sue L.

Answer:

ArrayList is similar to an array where the search is simple. On the other hand, LinkedList is in linked list data structure which insertion and deletion is easily performed.

### Subject: Calculus

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Question:

Determine how fast the length of an edge of a cube is changing at the moment when the length of the edge is 5 cm and the volume of the cube is decreasing at a rate of 100 cm3/sec.

Sue L.

Answer:

The length of the edge is decreasing at a rate of 4/3 cm/sec at the moment

### Subject: Differential Equations

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Question:

Solve the ODE with initial condition: dy/dx y(2)=7y^2x^3=3.

Sue L.

Answer:

\begin{align*} y(x) & = \frac{-1}{\frac{7}{4}x^4 -\frac{85}{3}}. \end{align*}

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