Alicia C.

Electrical Engineering Major at Clemson University

Tutor Satisfaction Guarantee

Microsoft Excel

TutorMe

Question:

Find the sum of E13 to E22 and A4 to F4.

Alicia C.

Answer:

=SUM(E13:E22)+SUM(A4:F4)

Calculus

TutorMe

Question:

What is the derivative of $${2x^2+7x}\over{5x^4}$$

Alicia C.

Answer:

The quotient rule I like to think as "low dehigh minus high delow over low squared" as in the denominator times the derivative of the numerator minus the numerator times the derivative of the denominator over the denominator squared. $${d}\over{dx}$$$${2x^2+7x}\over{5x^4}$$=$${5x^4(4x+7)-(2x^2+7x)(20x^3)}\over{25x^8}$$=$${x(4x+7)-(2x^2+7x)(4)}\over{5x^5}$$=$${4x^2+7x-8x^2-28x}\over{5x^5}$$=$${-4x^2-21x}\over{5x^5}$$=$${-4x-21}\over{5x^4}$$

Electrical Engineering

TutorMe

Question:

A parallel circuit has three resistors, R1, R2, R3, and a voltage source of 50 volts. R1 is in series with the voltage source and R2 and R3 are in parallel with each other. If R1=4 ohms, R2=20 ohms, and R3=80 ohms, then: a) what is the current through each resistor, b) what is the voltage through each resistor, and c) verify the total power developed equals the total power absorbed.

Alicia C.

Answer:

First, find the total resistance, RT, of the circuit. RT=R1+(R2*R3)/(R2+R3)=20 ohms. Using RT and Vs, we can find the total current, IT, which is equal to the current through R1, I1. IT=I1=Vs/RT=2.5A. With this we can find the voltage through R1. V1=R1*I1=10V. Now find the voltage through the R2 and R3 using R23.(R23=(R2*R3)/(R2+R3)=16 ohms). Since R2 and R3 are in parallel, their voltages are the same. V23=R23*I1=40V. With this we can find the current through R2 and R3. I2=V23/R2=2A. I3=V23/R3=0.5A. a) I1=2.5A, I2=2A, I3=0.5A b) V1=10V, V2=V3=40V. c) Pdev=Vs*IT=125W Pabs=R1*I1^2+R2*I2^2+R3*I3^2=25+80+20=125W Pdev=Pabs=125W

Send a message explaining your

needs and Alicia will reply soon.

needs and Alicia will reply soon.

Contact Alicia

Ready now? Request a lesson.

Start Session

FAQs

What is a lesson?

A lesson is virtual lesson space on our platform where you and a tutor can communicate.
You'll have the option to communicate using video/audio as well as text chat.
You can also upload documents, edit papers in real time and use our cutting-edge virtual whiteboard.

How do I begin a lesson?

If the tutor is currently online, you can click the "Start Session" button above.
If they are offline, you can always send them a message to schedule a lesson.

Who are TutorMe tutors?

Many of our tutors are current college students or recent graduates of top-tier universities
like MIT, Harvard and USC.
TutorMe has thousands of top-quality tutors available to work with you.