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lara [203]
3 years ago
15

What is the product of 5.2×

bsmiddle" class="latex-formula"> and 1.3×10^{-2}?
A. 6.76×10^{8}
B. 6.76×10^{2}
C. 6.76×10^{-2}
D. 6.76×10^{-8}
Mathematics
2 answers:
marysya [2.9K]3 years ago
6 0

Answer:

6.76 × 10²

Step-by-step explanation:

5.2 × 10^{4} × 1.3 × [/tex]10^{-2}[/tex]

= 5.2 × 1.3 × 10^{2}

= 6.76 × 10²

HACTEHA [7]3 years ago
5 0

Answer:

B. 6.76 x 10²

Step-by-step explanation:

5.2 × 10x^{4} (1.3 × 10x^{-2})    Subtract the exponents to get a common exponent

5.2 x 1.3 x 10²                  Multiply

6.76 x 10²

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The number is 9.

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Solve the following formula for t.<br> A= J(1 + rt)
Lubov Fominskaja [6]

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Pasos para resolver una ecuación linea

A=J(1+rt)

Usa la propiedad distributiva para multiplicar J por 1+rt.

A=J+Jrt

Intercambie los lados para que todos los términos de las variables estén en el lado izquierdo.

J+Jrt=A

Combina todos los términos que contienen J.

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La ecuación está en formato estándar.

(rt+1)J=A

Divide los dos lados por 1+rt.

rt+1(rt+1)J=rt+1A

Al dividir por 1+rt, se deshace la multiplicación por 1+rt.

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Suppose that replacement times for washing machines are normally distributed with a mean of 9.4 years and a standard deviation o
Nezavi [6.7K]

Using the normal distribution, it is found that the replacement time that separates the top 18% from the bottom 82% is of 11.23 years.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean \mu and standard deviation \sigma is given by:

Z = \frac{X - \mu}{\sigma}

  • The z-score measures how many standard deviations the measure is above or below the mean.
  • Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.

In this problem, the mean and the standard deviation are, respectively, given by \mu = 9.4, \sigma = 2.

The desired value is the 82nd percentile, which is X when Z = 0.915, hence:

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