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May 27th, 2013, 01:20 PM   #1
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arithmetic progression

I have attached the questions...please someone help me out.[attachment=0:yfamvqou]698.png[/attachment:yfamvqou]
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May 27th, 2013, 02:23 PM   #2
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Each successive speed after the slowest is 10% greater than its predecessor. This suggests that the speeds form a geometric progression, not an arithmetic progression.

The nth term in the geometric progression would be 2000(1.1^(n-1))rpm, which you can evaluate for n = 5, 6 and 7 in order to answer part (a) of the problem.
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