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dybincka [34]
3 years ago
7

How do you do these math problems?

Mathematics
1 answer:
Crank3 years ago
3 0

D is the amount

n is the number of days


D_{n=1} = 475\\D_{n=2} = 475 + (.75* 475)\\D_{n=3} = 475 + .75(475 + (.75 * 475))\\D_{n=3} = 475 + .75*475 + .75^{2} * 475\\D_{n} = 475 + .75*475+.75^{2}*475... +.75^{n-1} * 475

So therefore:

475 * \sum_{n=1}^{\infty} 0.75^{n-1} = D_{n}



See attached images for a similar problem from Chegg



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