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olasank [31]
3 years ago
12

The admission price was $1.00 in 1909. How much would the Speedway have had to charge in 1999 to match the purchasing power of $

1 in 1909? In other words, how much was that in 1999? (Don't use a $ sign, use 2 decimal places.)
Mathematics
1 answer:
olga55 [171]3 years ago
8 0

Answer: 13.04

Here are some consumer price indexes from the past 100+ years:

Year CPI

1909 9.1

1919 17.3

1929 17.1

1939 13.9

1949 23.8

1959 29.1

1969 36.7

1979 72.6

1989 118.3

1999 166.6

2009 214.5

2015 238.5

The admission price was $1.00 in 1909. How much would the Speedway have had to charge in 1989 to match the purchasing power of $1 in 1909? In other words, how much was that in 1989?

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7 0
3 years ago
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Step-by-step explanation:

Let "c" be the original number of classrooms.

The 1200/c was the original number of students per classroom.

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10c^2-40c-4800 = 0

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Positive solution:

c = 24 (# of classrooms originaly planned)

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