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Alina S.
Tutor for 4 years, Incoming Software Engineer at Google
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TutorMe
Question:

Aaron is staying at a hotel that charges $99.95 per night plus tax for a room. A tax of 8% is applied to the room rate, and an additional onetime untaxed fee of$5.00 is charged by the hotel. Which of the following represents Aaron’s total charge, in dollars, for staying x nights?

Alina S.
Answer:

1.08(99.95x)+5 The total charge that Aaron will pay is the room rate, the 8% tax on the room rate, and a fixed fee. If Aaron stayed x nights, then the total charge is (99.95 x plus 0.08 * 99.95 x) + 5, which can be rewritten as 1.08 (99.95 x) + 5.

Java Programming
TutorMe
Question:

What's the difference between String and StringBuilder class in Java?

Alina S.
Answer:

String is an immutable class meaning you would have to account for additional memory every time you want to change or make an edit to a String. In StringBuilder you can modify strings efficiently

Calculus
TutorMe
Question:

What is the limit as x approaches infinity of $$\frac {1}{x^2-3x+5}$$ *$$\sqrt{9x^4 + 1}$$

Alina S.
Answer:

3

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