1) A computer is more powerful than a simple calculator due to its ability to perform a wide range of complex tasks, including:

- Multitasking: Computers can run multiple programs simultaneously, allowing for more efficient productivity.
- Storage capacity: Computers have larger storage capacity, allowing for the storage and retrieval of vast amounts of data.
- Connectivity: Computers can connect to the internet and other devices, enabling communication and data transfer.
- Processing power: Computers have faster processors and can perform complex calculations and operations at a much higher speed compared to calculators.
- Software applications: Computers can run a variety of software applications for different purposes, such as image editing, video rendering, programming, etc.
- Multimedia support: Computers can handle multimedia files, including audio, video, and images, making them suitable for entertainment purposes.

2)

a) 76328 + 66185:
- Manually without the calculator: 142,513
- With a simple calculator: 142,513
- With Excel: 142,513

b) 58.6 - 29.9:
- Manually without the calculator: 28.7
- With a simple calculator: 28.7
- With Excel: 28.7

c) 34826 ÷ 7:
- Manually without the calculator: 4,975.14
- With a simple calculator: 4,975.14
- With Excel: 4,975.142857

d) 38% of 512:
- Manually without the calculator: 194.56
- With a simple calculator: 194.56
- With Excel: 194.56

3) In terms of accuracy, all three modes of computation - manual calculation, simple calculator, and Excel - should provide the same accurate results for basic calculations, as long as the inputs and operations are correctly entered. However, when it comes to more complex calculations, errors may occur in manual calculations due to human error. Simple calculators and Excel, on the other hand, are designed for accuracy and should provide precise results.

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