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Suppose U denotes the number of digits i...

Suppose `U` denotes the number of digits in the number` (60)^(100)` and`M` denotes the number of cyphers after decimal, before a significant figure comes in `(8)^(-296)`. If the fraction U/M is expressed as rational number in the lowest term as `p//q` (given `log_(10)2=0.301` and `log_(10)3=0.477`) .
The value of p is

A

1

B

2

C

3

D

4

Text Solution

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The correct Answer is:
To solve the problem step by step, we will first find the values of \( U \) and \( M \), and then calculate the fraction \( \frac{U}{M} \) in its lowest terms. ### Step 1: Calculate \( U \) \( U \) denotes the number of digits in the number \( (60)^{100} \). The number of digits \( d \) in a number \( n \) can be found using the formula: \[ d = \lfloor \log_{10} n \rfloor + 1 \] Thus, we have: \[ U = \lfloor \log_{10} (60^{100}) \rfloor + 1 \] Using the logarithmic property \( \log_{10} (a^b) = b \cdot \log_{10} a \), we can write: \[ U = \lfloor 100 \cdot \log_{10} 60 \rfloor + 1 \] Next, we need to find \( \log_{10} 60 \): \[ \log_{10} 60 = \log_{10} (6 \times 10) = \log_{10} 6 + \log_{10} 10 \] Since \( \log_{10} 10 = 1 \), we can express \( \log_{10} 6 \) as: \[ \log_{10} 6 = \log_{10} (2 \times 3) = \log_{10} 2 + \log_{10} 3 \] Substituting the values: \[ \log_{10} 2 = 0.301 \quad \text{and} \quad \log_{10} 3 = 0.477 \] Thus: \[ \log_{10} 6 = 0.301 + 0.477 = 0.778 \] Now, substituting back: \[ \log_{10} 60 = 0.778 + 1 = 1.778 \] Now we can find \( U \): \[ U = \lfloor 100 \cdot 1.778 \rfloor + 1 = \lfloor 177.8 \rfloor + 1 = 177 + 1 = 178 \] ### Step 2: Calculate \( M \) \( M \) denotes the number of ciphers after the decimal in \( (8)^{-296} \). We can express this as: \[ M = \text{number of ciphers after decimal in } (8)^{-296} = \text{number of digits in } (8)^{296} \] This can be calculated similarly: \[ M = \lfloor \log_{10} (8^{-296}) \rfloor + 1 \] Using properties of logarithms: \[ M = \lfloor -296 \cdot \log_{10} 8 \rfloor + 1 \] Now, we need to find \( \log_{10} 8 \): \[ \log_{10} 8 = \log_{10} (2^3) = 3 \cdot \log_{10} 2 = 3 \cdot 0.301 = 0.903 \] Substituting back: \[ M = \lfloor -296 \cdot 0.903 \rfloor + 1 = \lfloor -267.288 \rfloor + 1 = -268 + 1 = 267 \] ### Step 3: Calculate \( \frac{U}{M} \) Now we can find the fraction: \[ \frac{U}{M} = \frac{178}{267} \] ### Step 4: Simplify \( \frac{U}{M} \) To simplify \( \frac{178}{267} \), we find the GCD of 178 and 267. The GCD is 89: \[ \frac{178 \div 89}{267 \div 89} = \frac{2}{3} \] ### Final Result Thus, \( \frac{U}{M} = \frac{2}{3} \), and the value of \( p \) is: \[ \boxed{2} \]
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