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yulyashka [42]
3 years ago
6

What is the value of x when the Richter scale rating is 7.8? Round your answer to the nearest hundredth.

Mathematics
1 answer:
Tcecarenko [31]3 years ago
7 0

Hello,

We have to use this relation : \text{rating}=\log(\text{ratio})

He we have :

\log_{10}(x)=7.8\\\\\text{then }x=10^{\log_{10}(x)}\\\\\rightarrow x=10^{7.8}\\\\\rightarrow x=6.309\times 10^{7}\\\rightarrow x=6.31\times 10^{7}


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Out of a class of 150 students, two-fifths opted for German classes and one-third opted for Italian classes. The remaining opted
Yuliya22 [10]

Fraction of students that opted for French = \frac{4}{15}

The total number of students = 150

Fraction of students that opted for German = \frac{2}{5}

Fraction of students that opted for Italian = \frac{1}{3}

Fraction of students that opted for French = 1 - Fraction of students that opted for German - Fraction of students that opted for Italian

Fraction of students that opted for French = 1-\frac{2}{5} - \frac{1}{3}

Fraction of students that opted for French = \frac{15-6-5}{15}

Fraction of students that opted for French = \frac{4}{15}

Learn more here: brainly.com/question/18819021

8 0
3 years ago
What is x + 2/3 = -4
BartSMP [9]

Answer:

x = -14/3

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Equality Properties

Step-by-step explanation:

<u>Step 1: Define</u>

x + 2/3 = -4

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Subtract 2/3 on both sides:                    x = -14/3
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3 years ago
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JulijaS [17]

Answer:

b because it is

Step-by-step explanation:

153.2 is a cool number

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