Enable contrast version

# Tutor profile: Harry R.

Inactive
Harry R.
Teaching Advance Mathematics and Engineering Statistics for 2 years
Tutor Satisfaction Guarantee

## Questions

### Subject:Geometry

TutorMe
Question:

The circumference of a circle is 30. What is its area?

Inactive
Harry R.

The circumference of a circle is given by the formula C = 2*pi*r, where r is the radius of the circle. Substitute the given circumference into this formula and solve for r. 30pi = 2*pi*r r = 15 Therefore, the radius of the circle is 15. Use this to find the area of the circle. The area of a circle is given by the formula A= pi*r^2. Substitute the length of the radius into this formula and calculate the area. A =pi*(15)2 = 225pi Therefore the answer is 225pi

### Subject:Basic Math

TutorMe
Question:

The exam scores of all 500 students were recorded and it was determined that these scores were normally distributed.If Jane's score is 0.8 standard deviation above the mean, then how many, to the nearest until,students stored above Jane?

Inactive
Harry R.

The exam scores of all 500 students were recorded and it was determined that these scores were normally distributed.If Janes score is 0.8standard deviation above the mean, then how many, to the nearest until,students stored above Jane? Z score =   ( score - Mean) / Standard deviation => Z score = ( Mean + 0.8 Standard deviation - Mean)/Standard deviation => Z score =  0.8 Standard deviation/Standard deviation => z score = 0.8 z score 0.8  = 78.81 %  ( see attached z score table) Number of students who scored more than Jane = 100 - 78.81% = 21.19 % 21.19 % of 500 = (21.19/100) * 500 = 105.95 = 106

### Subject:Mechanical Engineering

TutorMe
Question:

What is a machine?

Inactive
Harry R.

A machine is a device that simply transforms the direction or magnitude of a force, but a large number of more complex machines exist. Examples include vehicles, electronic systems,molecular machines, computers, television, and radio.

## Contact tutor

Send a message explaining your
needs and Harry will reply soon.
Contact Harry

Start Lesson

## 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 Lesson" 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.
BEST IN CLASS SINCE 2015
TutorMe homepage