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4 years ago

Half of 6900 and 8100

Mathematics

2 answers:

klio [65]4 years ago

5 0

6900 + 8100 = 15000

15000 divided by 2 = 7500

So your answer is 7500

viva [34]4 years ago

3 0

11550 is the answer hopfully it helps Good Luck!

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Which property of real numbers is illustrated by the equation 52+(27+35= (52+27) +36?

Wittaler [7]

The answer is b associative property

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2 years ago

Describe the transformations (from the parent function) of this exponential function : y=3(2^x-1)+1

viktelen [127]

For the answer to the question above asking to describe the transformations (from the parent function) of this exponential function: y=3(2^x-1)+1

I think "(2 IS THE POWER OF X-1 NOT JUST X)"

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The successive transformations are:
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4 years ago

Prove the identity: (a-b)(a+b)(a^2+b^2)(a^4+b^4) Please help quickly for brainliest

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Statistics professors believe the average number of headaches per semester for all students is more than 18. From a random sampl

kompoz [17]

Complete Question

Statistics professors believe the average number of headaches per semester for all students is more than 18. From a random sample of 15 students, the professors find the mean number of headaches is 19 and the standard deviation is 1.7. Assume the population distribution of number of headaches is normal.the correct conclusion at $\alpha =0.001$ is?

Answer:

There is no sufficient evidence to support the professor believe

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 18$

The sample size is $n = 15$

The sample mean is $\= x = 19$

The standard deviation is $\sigma = 1.7$

The level of significance is $\alpha = 0.001$

The null hypothesis is $H_o: \mu = 18$

The alternative hypothesis is $H_a : \mu > 18$

The critical value of the level of significance from the normal distribution table is

$Z_{\alpha } = 3.290527$

The test hypothesis is mathematically represented as

$t = \frac{\= x - \mu }{ \frac{\sigma}{ \sqrt{n} } }$

substituting values

$t = \frac{ 19 - 18}{ \frac{1.7}{ \sqrt{15} } }$

$t = 2.28$

Looking at the value of t and $Z_{\alpha }$ we can see that $t < Z_{\alpha }$ so we fail to reject the null hypothesis.

This mean that there is no sufficient evidence to support the professor believe

3 0

4 years ago

The population of the U.S. Is about 309,975,000, covering a land area of 3,717,000 square miles. The population of India is abou

maks197457 [2]

Answer:

Step-by-step explanation:

The formula for determining population density is expressed as

Population density = number of people/land area

The population of the U.S. Is about 309,975,000, covering a land area of 3,717,000 square miles. This means that the population density of the US is

309975000/3717000 = 83.39 people per square mile

The population of India is about 1,184,639,000, covering a land area of 1,269,000 square miles. This means that the population density of the India is

1184639000/1269000 = 933.52 people per square mile

Therefore, the population density of India is higher than the population density of the Us by

933.52 - 83.39 = 850.13 people per square mile

3 0

3 years ago