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Tutor profile: Donald L.

Inactive
Donald L.
engineering graduate student, lifelong learner, tutor-in-the-making
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Questions

Subject: Pre-Calculus

TutorMe
Question:

Match the equations (1-4) below to the description of their graph (i-iv). 1) y = x 2) y = x^2 3) y = x^3 4) y = 1/x i) hyperbola ii) parabola iii) straight line iv) cubic

Inactive
Donald L.
Answer:

1) Goes with (iii) straight line 2) Goes with (ii) parabola 3) Goes with (iv) cubic 4) Goes with (i) hyperbola

Subject: Mechanical Engineering

TutorMe
Question:

Typical problems would include a diagram of forces that interplay. Since that is not an option, just a basic question, what do mechanical engineers do?

Inactive
Donald L.
Answer:

Mechanical engineers are maybe the most diverse engineers. They do everything from designing and manufacturing small parts to building large energy generating or energy-using systems, such as power facilities, HVAC and refrigeration facilities, and aircrafts.

Subject: Calculus

TutorMe
Question:

What is the derivative of (4x^2) * (x^3 + 5)?

Inactive
Donald L.
Answer:

f(x) = (4x^2)*(x^3 + 5) f'(x) = (8x)(x^3 + 5) + (4x^2)(3x^2 + 5) f'(x) = 8x^4 + 40x + 12x^4 + 20x^2 ANS: f'(x) = 20X^4 + 20x^2 + 40x

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