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Setler79 [48]
3 years ago
7

The population of Rhode Island is approximately 1.059 x 10 to the sixth power, while the population of the Earth is approximatel

y 7.753 x 10 the 9th power. About how many times larger is earth's population
Mathematics
2 answers:
lana66690 [7]3 years ago
6 0

Answer:

  • 7.321 × 10³

Step-by-step explanation:

<u>The population of Rhode Island:</u>

  • 1.059 × 10⁶

<u>The population of the Earth:</u>

  • 7.753 × 10⁹

<u>About how many times larger is earth's population:</u>

  • 7.753 × 10⁹ ÷ 1.059 × 10⁶ = 7.753/1.059 × 10⁹⁻⁶ ≈ 7.321 × 10³
Over [174]3 years ago
4 0

▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪

Let's solve :

  • \dfrac{7.753 \times  {10}^{9} }{1.059 \times 10 {}^{6} }

  • 7.321\times 10  {}^{3}

  • \approx7321

hence, population Earth is approximately 7321 times the population of Rhode Island.

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A different species of cockroach has weights that are approximately Normally distributed with a mean of 50 grams. After measurin
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Answer:

The standard deviation of weight for this species of cockroaches is 4.62.

Step-by-step explanation:

Given : A different species of cockroach has weights that are approximately Normally distributed with a mean of 50 grams. After measuring the weights of many of these cockroaches, a lab assistant reports that 14% of the cockroaches weigh more than 55 grams.

To find : What is the approximate standard deviation of weight for this species of cockroaches?

Solution :

We have given,

Mean \mu=50

The sample mean x=55

A lab assistant reports that 14% of the cockroaches weigh more than 55 grams.

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The total probability needs to sum up to 1,

P(X\leq 55)=1-P(X>55)

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The z-score value of 0.86 using z-score table is z=1.08.

Applying z-score formula,

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Where, \sigma is standard deviation

Substitute the values,

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3 years ago
Sheila, janice, and katen, working together at the same rate, can complete a job in 3 1/3 days. Working at the same rate, how mu
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Answer:

Janice and Karen could do in 1 day:

  • <u>20% of the job</u>.

Step-by-step explanation:

To identify how much of the job could janice and caren do in 1 day, first, we must find how much of the job make just 1 person at the same rate:

If three persons make a job in 3 1/3 days, 1 person make the job in x:

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Then:

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As you can see, <u><em>Janice and Karen just in a day could do 20% of the job</em></u>.

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