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HACTEHA [7]
2 years ago
11

right three million, eight hundred sixty-two thousand, seven hundred ninety-five standard: and expanded:​

Mathematics
1 answer:
harina [27]2 years ago
4 0

Answer:

Expanded: 3,000,000- 800,000- 60,000- 2,000- 700- 90- 5

Standard: 386,2795

Hope this helps!!

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In the orchard there were 10 rows with 12 trees in each row. How many trees were in the orchard?
Elodia [21]
Multiply 10 x 12 = 120 trees
3 0
3 years ago
How do i solve this? Please give me step by step explanation.
Viktor [21]

Answer:1.5

Step-by-step explanation:

12.6j + 8 = 10.2j +4.4

2.4j=3.6

j=3.6/2.4= 1.5

3 0
2 years ago
Read 2 more answers
1. The national mean (μ) IQ score from an IQ test is 100 with a standard deviation (s) of 15. The dean of a college wants to kno
Nat2105 [25]

Answer:

We conclude that the mean IQ of her students is different from the national average.

Step-by-step explanation:

We are given that the national mean (μ) IQ score from an IQ test is 100 with a standard deviation (s) of 15.

The dean of a college want to test whether the mean IQ of her students is different from the national average. For this, she administers IQ tests to her 144 students and calculates a mean score of 113

Let, Null Hypothesis, H_0 : \mu = 100 {means that the mean IQ of her students is same as of national average}

Alternate Hypothesis, H_1 : \mu\neq 100  {means that the mean IQ of her students is different from the national average}

(a) The test statistics that will be used here is One sample z-test statistics;

               T.S. = \frac{Xbar-\mu}{\frac{s}{\sqrt{n} } } ~ N(0,1)

where, Xbar = sample mean score = 113

              s = population standard deviation = 15

             n = sample of students = 144

So, test statistics = \frac{113-100}{\frac{15}{\sqrt{144} } }

                             = 10.4

Now, at 0.05 significance level, the z table gives critical value of 1.96. Since our test statistics is more than the critical value of z which means our test statistics will fall in the rejection region and we have sufficient evidence to reject our null hypothesis.

Therefore, we conclude that the mean IQ of her students is different from the national average.

3 0
3 years ago
Did you hear about the two punsters who told a lot of jokes about cats
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Cool. and. gooooooooood.
6 0
3 years ago
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Help<br> I’ll give a lot of credits
jenyasd209 [6]

Answer:

52.5

Step-by-step explanation:

5 0
2 years ago
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