COMPUTERS AND TECHNOLOGY HIGH SCHOOL

Given a variable named 'name' that has been initialized with a string, write an expression that evaluates to the third character in 'name'. a) name[3] b) name(3) c) name.charAt(3) d) name[2]

Answers

Answer 1
Answer:

Answer:

charAt(3)

Explanation:

charAt as it is the third

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Answers

d) TO, this is because the email is to the main email address

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Answers

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Answers

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Given that the time to read data off a 7200 rpm disk drive will be roughly 75% of a 5400 rpm disk, at what idle time of the 7200 rpm disk will the power consumption be equal, on average, for the two disks?

Answers

Answer:

Given that the time to read data off a 7200 rpm disk drive will be roughly 75% of 5400 rpm disk, at 30% idle time of 7200 rpm disk will the power consumption be equal, on average for the two disk

Explanation:

Let the 7200-disk busy time = x  ( we need to calculate it)

As given in the question the in the given time to read data off a 7200 rpm disk drive will be roughly 75% of 5400 rpm disk. This mean that we equalize the equations of both disk power

7200-disk power      =     5400-disk power

here we apply the formula to calculate the 7200 rpm disk busy time

4.0 * (1-x) + 7.9 * x      =     2.9 * (1-x/0.75) + 7.0 * x/0.75

4.0 + 3.9 x                  =      2.9 – 3.87 x + 9.33 x

1.1                                =        5.47 x – 3.9 x

we calculate the value for x

Hence                   x = 0.70

Applying formula to calculate the idle time.

Idle time = 1.0 – 0.70 = 0.30

PLEASE HELP ME I WILL APPROVE!!!Which of the following best describes the difference between software and hardware?
A. Hardware is the outside of the computer; software is the material on the inside of a computer.

B. Software is the material produced by the computer like a business letter; hardware is the information in the computer.

C. Hardware is the equipment; software is the programs.

D. Software is the part of the computer that you can touch; hardware is the instructions given to the computer.

Answers

C. Hardware is the equipment; software is the programs

Answer:

C. hardware is the equipment; software is the programs

Explanation:

I am a genius

What does spreadsheet program allows a user to do? a. Perform complicated calculations automatically b. Deliver elegant presentation to a large audience easily c. Organize, send, and retrieve e-mails quickly d. Keep viruses from infecting their computers

Answers

The correct answer is letter A. Spreedsheet programs are designed to perform complicated calculations automatically by just inputting the numbers and setting formulas. Hope this answer helps. Good luck!
the answer is A, for programs like Microsoft Excel.
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