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Citrus2011 [14]
3 years ago
7

If r=0.5 and a6=0.03125 what is the value of a1?

Mathematics
2 answers:
andre [41]3 years ago
5 0

I guess this is a geometric series:

a6 = a1 * r^5 so

a1 =  0.03125 / 0.5^5

=  1    answer

Ulleksa [173]3 years ago
4 0

I would say 1 is your answer

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Let t represent Todd's age now.
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_____
You can also work this by considering "ratio units." 3 years ago, the ratio of their ages was 4:1, a difference of 3. That difference corresponds to 81 years, so each "ratio unit" represents 81/3 = 27 years. Todd's age then was 1 ratio unit, 27 years. Now, Todd's age is 30.
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