2 years ago

D Answer each question.

Mathematics

1 answer:

nika2105 [10]2 years ago

6 0

Answer:

Step-by-step explanation:

1. Humans can detect sounds in a frequency range from about 20 Hz to 20 kHz.

2. speed of sound is 343 m/sec.

3. two animals are Bats and Whales.

4.The voiced speech of a typical adult male will have a fundamental frequency from 85 to 180 Hz, and that of a typical adult female from 165 to 255 Hz.

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Approximately 68% of films are rated R. If 720 films were recently rated, how many were rated R?

zloy xaker [14]

Answer:

Approximately 490 films were rated R.

Step-by-step explanation:

Total films recently rated is 720. About 68% of the films were rated R. Thus, 68% of 720 is calculated below.

$68\% \: of \: 720 \: films$

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$= 0.68 \times 720$

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$= 490 \: films \: (approximated)$

Therefore, if 720 films were recently rated, 68% of films rated R is about 490 films.

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