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Paladinen [302]
3 years ago
7

Felipe is saving money to buy a game. So far he has saved $30, which is five-sixths of the total cost of the game. How much does

the game cost?
Mathematics
1 answer:
Rzqust [24]3 years ago
3 0

Answer:

25

Step-by-step explanation:

ok so the game cost 25 you have to 5÷6×30=25 hooe its right

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A researcher claims that the mean cost of raising a child from birth to age 2 by husband­wife families in the U.S. is $13,960. A
irina1246 [14]

Answer:

Yes, there enough evidence to reject the claim.

Step-by-step explanation:

Here we need to perform a test for single mean to determine whether the  mean cost of raising a child from birth to age 2 by husband-wife families in the U.S. is $13,960.

The hypothesis is:

<em>H₀</em>: The  mean cost of raising a child from birth to age 2 by husband-wife families in the U.S. is $13,960, i.e. µ = $13,960.

<em>Hₐ</em>: The  mean cost of raising a child from birth to age 2 by husband-wife families in the U.S. is different from $13,960, i.e. µ ≠ $13,960.

The information provided is:

\ar x=13725\\\sigma=2345\\n=500\\\alpha =0.10

The test statistic is:

z=\frac{\bar x-\mu}{\sigma/\sqrt{n}}=\frac{13725-13960}{2345/\sqrt{500}}=-2.24

The test statistic value is -2.24.

Compute the <em>p</em>-value for this test statistic value at 10% level of significance as follows:

p-value=2\times P(Z

               =2\times 0.01255\\=0.0251

Use the <em>z</em>-table.

The calculated <em>p</em>-value is, 0.0251 < 0.10, therefore the null hypothesis will be rejected.

<u>Conclusion</u>:

As the null hypothesis is rejected at 10% level of significance it can be concluded that there enough evidence to reject the claim.

The  mean cost of raising a child from birth to age 2 by husband-wife families in the U.S. is different from $13,960.

5 0
3 years ago
Which choice represents the best rational approximation for 20 ? A) 2.7 B) 4.5 C) 4.8 D) 5.2
konstantin123 [22]
I thin that the answer is A
6 0
3 years ago
Convert 0.00001 to a power of 10.
kolezko [41]

Answer:

10^-5

Step-by-step explanation

Move the decimal to the right 5 places. Moving to the right makes the power a negative, moving to the left would make it a positive.

6 0
3 years ago
3.) Simplify the expression by combining like
Evgesh-ka [11]

45s^2-19-s^2+16\\=45s^2-s^2-19+16\\=s^2(45-1)-19+16\\=44s^2+(-19+16)\\=44s^2-3

Hope that helps and hope you get better!

3 0
2 years ago
Write down the exact value of:<br> a) cos 60°<br> b) sin 0°<br> c) tan 45°
sergey [27]

Answer:

cos 60 1/2

sin0 0

tan45 1

Step-by-step explanation:

do it in calculator

7 0
3 years ago
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