+0

+1
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On the first day of a measles outbreak at a school, 6 students were identified to have the measles. Each day for the following two weeks, the number of new cases doubled from those identified with the disease the day prior. How many students are identified to have measles in all at the end of the 6th day of the outbreak?

A) 286

B) 315

C) 345

D) 378

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Thank you to anyone who helps!

Jaleco  Apr 15, 2018
edited by Jaleco  Apr 15, 2018
edited by Jaleco  Apr 15, 2018

#2
+2

Use Geometric Series formula:

S = F x (1 - R^N) / (1 - R)

S = 6 x (1 - 2^6) / (1 - 2)

S = 6 x (1 - 64) / (-1)

S = 6 x ( -63) / (-1)

S = 6 x     63

S =378

Guest Apr 15, 2018
Sort:

#1
0

What happened to your first question?

Guest Apr 15, 2018
edited by Guest  Apr 15, 2018
#2
+2

Use Geometric Series formula:

S = F x (1 - R^N) / (1 - R)

S = 6 x (1 - 2^6) / (1 - 2)

S = 6 x (1 - 64) / (-1)

S = 6 x ( -63) / (-1)

S = 6 x     63

S =378

Guest Apr 15, 2018

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