Use properties of exponents to complete the equivalent expression. (Take a look at the image).

Mathematics

1 answer:

kondaur [170]3 years ago

6 0

The exponent would b 15

U just gotta solve it than u get 3375 than look for the square root of that and it’s 15over15

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valentinak56 [21]

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Step-by-step explanation:

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3 years ago

NO LINKS!!! Please help fill in the blanks. Part 10a.

pogonyaev

Sound level is measured in decibels (dB).

The equation $\beta = 10\log\left(\frac{I}{I_0}\right)$ , where $I_0$ is the intensity of the threshold sound a human can hear ( $10^{-12}$ $\text{watts}$ / $\text{meter}^2$ ) and $I$ is the intensity of the sound being measured, gives the sound level, $\beta$

Example:

What was the intensity of the launch of NASA's Saturn V rocket, about 200 dB?

$\beta = 10\log\left(\frac{I}{I_0}\right)\\\\\text{Substitute.} \ 200 = 10\log\left(\frac{I}{10^{-12}}\right)\\\\\text{Isolate the log.} \ 20 = \log\left(\frac{I}{10^{-12}}\right)\\\\\text{Rewrite into exponential form.} \ \frac{I}{10^{-12}} = 10^{20}\\\\\text{Solve for the variable}\\ \ I = (10^{20})(10^{-12}) = 10^8 = 100,000,000 = \text{100 million watts/}m^2$