# Tutor profile: Sullivan L.

Inactive

Sullivan L.

Electrical Engineer in the Defense Industry

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## Questions

### Subject: Electrical Engineering

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Question:

Given a circuit with a voltage source of 24 Volts and a resistor rated at 1.5k ohms. What is the necessary wattage required for the resistor?

Inactive

Sullivan L.

Answer:

Equations Needed Ohms Law: V=IR P=VI First find current I=V/R I=24/1500 I=0.016 Amps P=VI P=24(0.016) P=0.384Watts This means a 1/2 Watt resistor will be required

### Subject: Calculus

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Question:

f(x)=6x^3 -9x+4 find f(x)'

Inactive

Sullivan L.

Answer:

f(x) =6x^3 -9x +4 f(x)'= (3)(6)(x^3-1) - (1)(9)(x^1-1) + (0)(4) f(x)'=16x^2 -9

### Subject: Algebra

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Question:

x^2 +4x +x=0 Solve for x

Inactive

Sullivan L.

Answer:

x^2 +4x+4=0 (x+2)(x+2)=0 (x+2)^2=0 x+2=0 X=-2

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