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jenyasd209 [6]
3 years ago
9

MUST BE CORRECT ANSWER HELP ASAP

Mathematics
1 answer:
Nina [5.8K]3 years ago
6 0

Answer:

40287600 = B. 4 x 10^{7}

Step-by-step explanation:

<u>We first have to do the multiplication of the numbers given:</u>

19 * 2,120,400

=> 40287600

<u>Now we have to figure out how many digits are after the number 4:</u>

4, 0 2 8 7 6 0 0

7 digits

Meaning that we need an exponent of 7 for it to be in scientific notation, giving us with the answer B. 4  x 10^{7}

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You wish to compare the prices of apartments in two neighboring towns. You take a simple random sample of 12 apartments in town
Rom4ik [11]

Answer:

The value of P-value is 0.0472.

Step-by-step explanation:

We are given that you take a simple random sample of 12 apartments in town A and calculate the average price of these apartments. You repeat this for 15 apartments in town B.

Let \mu_1 = <u><em>true average price of apartments in town A</em></u>

\mu_2 = <u><em>true average price of apartments in town B</em></u>

So, Null Hypothesis, H_0 : \mu_1=\mu_2

Alternate Hypothesis, H_A : \mu_1\neq \mu_2  

The test statistics that have been used here is <u>two-sample t-test statistics</u>, i.e;

The test statistics given to us is 2.1

Now, the P-value of the test statistics is given by the following formula;

                P-value = P( t__n__1+_n_2-_2 > 2.1)

                             = P( t_2_5 > 2.1) = 0.0236

In two-tailed test, P-value is calculated as = 2 \times 0.0236 = <u>0.0472</u>

Hence, the value of the p-value is 0.0472.

7 0
2 years ago
2+2= HURRY I THINK ITS GOLDFISH BUT I DONT KNOW
Bingel [31]

Answer:

4

Step-by-step explanation:

7 0
3 years ago
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Solve the system of equations<br><br> 3x+5y=30<br> -5y+3x=15
nasty-shy [4]

Answer:

x = 7.5    y = 1.5

Step-by-step explanation:

3x + 5y = 30

-5y + 3x = 15

3x + 5y = 30

<u>3x - 5y = 15</u>

6x = 45

x = 45/6

x = 7.5

3(7.5) + 5y = 30

22.5 + 5y = 30

5y = 7.5

y = 7.5/5

y = 1.5

Check:

3(7.5) + 5(1.5) = 30

-5(1.5) + 3(7.5) = 15

6 0
2 years ago
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Please help me with homework or i will get yelled by my teachers lolz
Amiraneli [1.4K]

Answer:

the answer to this is 7.

Step-by-step explanation:

7+3=10.

6 0
2 years ago
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Work out the percentage change to 2 decimal places when a price of £97 is decreased to £90.
egoroff_w [7]

Answer:

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Step-by-step explanation:

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