4570 x 1024^3 = 4.907000136
Scientific Notation = 4.91

Question 1b)
30 days of tweets could be stored on a 1 terabyte hard disk.

1 Terabyte (TB) = 1024 Gigabytes and = 1 million Megabytes
34000000/100,000,000 = 0.34
Nearest whole number = 30

Question 1c)
i.The percentage increase in tweets per day, is 20.7%

200,000,000 - 65,000,000 = 135,000,000
135,000,000/65,000,000 x 100% = 20.7

ii. If the percentage increase in traffic between 2010 and 2011 remains steady each year, I predict 150,000,000 tweets will be sent per day. My prediction may be inaccurate because-: 1.More or less people will tweet, so the figures will change. 2.Almost every day hundreds of people join twitter, so that means more tweets, so my prediction may be wrong.

DeviceTime per week, on and active (hours)Time per week, on but inactive (hours)Time per week, on standby (hours)Time per week, off (hours)Total energy used per week (kWh)Cost per year (£) Computer box 5 201630.45£164.25

Laptop computer 15 001532.25£821.25
TV 30 101304.50£450
Question 1d)
Question 2
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