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M Hasan, Teacher
Category: Homework
Satisfied Customers: 1849
Experience:  BA (Hons) in Mathematics from Oxford University
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# 1.A ball is orbiting counterclockwise at 100 revolutions per

### Resolved Question:

1.A ball is orbiting counterclockwise at 100 revolutions per minute (rpm) around a circle of radius 10 cm. The center of the circle is at the x-y origin (0, 0). At t = 0, the ball is at (10 cm, 0).

When does the ball first reach the y axis?

2.The two vectors A and B are defined as A=(3 m, 4 m) and B=(5 m, -3 m), where the first number is XXXXX x-component of the vector, and the second number is XXXXX y-component of the vector.

What is the magnitude of vector A?

What is A + B?

3.In the year 2003 the Acme Company has twice as many employees as managers. During the next 5 years, they hire twelve employees and fire two managers. Which of the following equations is correct for the current number of managers (NM2008) and the current number of employees (NE2008)?
Submitted: 3 years ago.
Category: Homework
Expert:  M Hasan replied 3 years ago.
Hi there!

1.

It will take quarter of a revolution to reach the y-axis. Hence,

100 rev ----- 60 sec
1/4 rev ----- t sec

100t = 60(1/4)
t = 0.15 s

Therefore, it first reaches the y-axis in 0.15 seconds.

2.

|A| = √(3² + 4²) = 5

A + B = (3 + 5, 4 - 3) = (8, 1)

3.

Please provide the relevant options so that I can guide you further.

Thanks. :)
Customer: replied 3 years ago.

 a. NM2008 + 2 = 2 (NE2008 - 12)b. NM2008 - 2 = 2 (NE2008 + 12)c. 2 (NM2008 + 2) = NE2008 - 12d. 2 (NM2008 - 2) = NE2008 + 12e. I can't eliminate any choices.
Expert:  M Hasan replied 3 years ago.
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M Hasan, Teacher
Category: Homework
Satisfied Customers: 1849
Experience: BA (Hons) in Mathematics from Oxford University

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